Suresh can finish a work in 15 hours. Ashutosh can finish the same work alone in 10 hours .if Suresh work alone for 9 hours and leaves .How many hours will be required to complete the work by Ashutosh?
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Concept:
Unitary method is a way for solving a particular problem by first calculating the value of a single unit, and then finding the necessary value by multiplying the single unit value.\
Given:
Suresh can finish a work in 15 hours.
Ashutosh can finish the work alone in 10 hours .
Find:
Number of hours required to complete the work by Ashutosh.
Solution:
Suresh's 1 hour's work = 1/ 15 units
Ashutosh's 1 hour's work = 1/ 10 units
Suresh's 9 hours' work
= 9 × 1/ 15 = 3/ 5 units
remaining work = 1 - ( 3/ 5)
= 2/ 5 units
Ashutosh will finish the remaining work in
= (2/ 5) ÷ (1/10)
= 20 ÷ 5 = 4 hours
Therefore, Ashutosh will finish the remaining work in 4 hours.
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