W completes 25 So 100 So, X completes the work in 40 days. nbsp; Y does 40 So, Y does 100 Z does 1/3 of work in 13 days. nbsp; So, Z completes work in 39 da ...

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Byju's Answer

Standard VII

Mathematics

Introduction to Unitary Method

W can do 25

Question

W can do 25% of the work in 30 days, X can do 1/4 of the work in 10 days, Y can do 40% of work in 40 days and Z can do 1/3 of the work in 13 days. Who will complete the work first?

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Solution

The correct option is D Z
W completes 25% work in 30 days,
So 100% work is completed in 120 days. X completes 1/4 work in 10 days.
So, X completes the work in 40 days.
Y does 40% of work in 40 days.
So, Y does 100% of the work in 100 days.
Z does 1/3 of work in 13 days.
So, Z completes work in 39 days.

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