Question
If Samuel takes 3 days to complete 5 diagrams, the number of diagrams he finishes in 15 days is ________.
- 20
- 30
- 15
- 25
Hint:
The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
The correct answer is: 25
Here, we are given that Samuel takes 3 days to finish 5 diagrams. We have to find the number of diagrams he can finish in 15 days.
Number of diagrams finished in 3 days = 5.
Number of diagrams finished in 1 day = 5/3.
Number of diagrams finished in 15 days = 5⁄3 × 15 = 25.
We can also find the number of diagrams finished by Samuel in 15 days by multiply the number of diagrams finished in 3 days by 5.
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