Question
25 men were employed to do a piece of work which they could finish in 20 days, but the men drop off by 5 at the end of every 10 days. In what time will the work be completed?
- 17 days
- days
- 8 days
- 26 days
The correct answer is: 8 days
Related Questions to study
A can complete a piece of work in 15 days. B can complete it in 10 days. With the help of C, they can complete the work in 4 days. They all worked together and earned a total of Rs. 750. Find C’s share
L.C.M is the least common multiple. We should know the concepts of work and wages.
A can complete a piece of work in 15 days. B can complete it in 10 days. With the help of C, they can complete the work in 4 days. They all worked together and earned a total of Rs. 750. Find C’s share
L.C.M is the least common multiple. We should know the concepts of work and wages.
Three persons A, B and C finished a piece of work. A worked at it for 5 days, B for 7 days and C for 9 days. Their daily wages are in the ratio of 4 : 3 : 2 and the total earning amounted to Rs. 118. What was the daily wage of A?
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A and B can do a piece of work in 40 days while B and C can do it in 60 days. If A is twice as good a workman as C, then C alone will do the work in
For such questions, we should know the concept of work and efficiency.
A and B can do a piece of work in 40 days while B and C can do it in 60 days. If A is twice as good a workman as C, then C alone will do the work in
For such questions, we should know the concept of work and efficiency.
Meena, Neena and Raveena can knit a shawl in 6, 4 and 8 hours respectively. What portion of the shawl will they knit in 1 hour if they work together?
L.C.M is the smallest common multiple of the given numbers.
Meena, Neena and Raveena can knit a shawl in 6, 4 and 8 hours respectively. What portion of the shawl will they knit in 1 hour if they work together?
L.C.M is the smallest common multiple of the given numbers.
Tap A can fill a tank in 8 hours and tap B can empty the tank in 12 hours. How long would it take to fill the empty tank if both of them are opened together?
For such questions, we should see if the taps are filling or emptying the tank. We should also be careful about subtraction or addition of fractions. We should make the denominator equal or take L.C.M before subtracting or adding.
Tap A can fill a tank in 8 hours and tap B can empty the tank in 12 hours. How long would it take to fill the empty tank if both of them are opened together?
For such questions, we should see if the taps are filling or emptying the tank. We should also be careful about subtraction or addition of fractions. We should make the denominator equal or take L.C.M before subtracting or adding.
Latha, Chetan and Amar started a business. Latha invests Rs 5000 for 2 years, Chetan invests Rs.1000 for 15 months and Amar invests Rs 3000 for 10 months. If there is a profit of Rs. 1925, find out the share of Latha
Latha, Chetan and Amar started a business. Latha invests Rs 5000 for 2 years, Chetan invests Rs.1000 for 15 months and Amar invests Rs 3000 for 10 months. If there is a profit of Rs. 1925, find out the share of Latha
The population of a town was 1,60,000 two years ago. If it has increased by 3% and 5% respectively in the last two years, find its present population
For such questions, we should be careful while finding the percentage increase in the population. We have to add the increased in number of population to the original population to get new population. We have to careful about order of increase in population.
The population of a town was 1,60,000 two years ago. If it has increased by 3% and 5% respectively in the last two years, find its present population
For such questions, we should be careful while finding the percentage increase in the population. We have to add the increased in number of population to the original population to get new population. We have to careful about order of increase in population.
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For such questions, we should know the formulas for simple and compound interest.
The difference between C.I and S.I for 2 years at 10% per annum is Rs 50. Find the sum
For such questions, we should know the formulas for simple and compound interest.
An electric wire of length ‘I’ and area of cross-section has a resistance R ohms. Another wire of the same material having same length and area of cross-section 4a has a resistance of
An electric wire of length ‘I’ and area of cross-section has a resistance R ohms. Another wire of the same material having same length and area of cross-section 4a has a resistance of
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Compound interest is the internet based on the principal amount and also the interest added to the sum. It's interst on that total amount.
Reena borrowed Rs 8000 from Neena for 2 years at per annum compound interest. What C.I. did Veena pay to Neena?
Compound interest is the internet based on the principal amount and also the interest added to the sum. It's interst on that total amount.
A 500 gm packet of tea is sold for Rs 80 and a tooth brush costing Rs 11 is given free with it. The shopkeeper thus makes a profit of 15% on it. What did the shopkeeper pay for it?
In such questions, we should be careful about finding the actual selling price before finding the cost price. We should know the formula to find the profit.
A 500 gm packet of tea is sold for Rs 80 and a tooth brush costing Rs 11 is given free with it. The shopkeeper thus makes a profit of 15% on it. What did the shopkeeper pay for it?
In such questions, we should be careful about finding the actual selling price before finding the cost price. We should know the formula to find the profit.
The place with which a 7-digit number starts in Indo-Arabic System is
For such questions we should know the places of digits in Indo-Arabian system. The key part is counting the zeros.
The place with which a 7-digit number starts in Indo-Arabic System is
For such questions we should know the places of digits in Indo-Arabian system. The key part is counting the zeros.
0.6395 × 1000 =
When multiplying a decimal number by power of 10, we shift the decimal by point by the value of power of the number.
0.6395 × 1000 =
When multiplying a decimal number by power of 10, we shift the decimal by point by the value of power of the number.
The place value of 5 in the number 215783 in Indo-Arabic System is
For such questions, we have to be careful to count from behind.
The place value of 5 in the number 215783 in Indo-Arabic System is
For such questions, we have to be careful to count from behind.