GATE Overflow | General Aptitude | Test 1 | Question: 25

Question

'A' can complete a piece of work in 12 days. 'A' and 'B' together can complete the same piece of work in 8 days. In how many days can 'B' alone complete the same piece of work?

Answer 1

A can do 1/12 th of work in one day

let x be the number of days by B to do the work alone

therefore 1/12 + 1/x = 1/8

simplifying

x = 24