Maths-
General
Easy
Question
Sita can finish typing a 100 page document in 9 hours, Mita in 6 hours and Rita in 12 hours. How long will they take to type a 100 page document if they work together?
Hint:
Hint:
When two quantities of different units are compared and expressed as a ratio, it is known as Rate. For example, a car travels at a speed of 100 kilometres per hour, then it means in one hour it covers 100 kilometres.
The correct answer is: 36/13 hours.
Step 1 of 2:
It is given that Sita can finish typing a 100 page document in 9 hours, Mita in 6 hours and Rita in 12 hours.
So, Pages typed by Sita in 1 hour = 
Pages typed by Mita in 1 hour = 
Pages typed by Rita in 1 hour = 
Step 2 of 2:
Let the time taken to type a 100 page document if they work together be t
Now, Pages typed by Sita in t hour + Pages typed by Mita in t hour + Pages typed by Rita in t hour = 100
t = 
hours
Final Answer:
Hence, the time taken to type a 100 page document if they work together is hours.
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