Question

A alone can complete 1/5 of a piece of work in 12 hours and B
alone can complete 1/6 of a piece of work in 15 hours. In how many
hours both working together can complete the work?

Answer 1

Answer:

180 hours

Step-by-step explanation:

Given,

A alone can complete 1/5 of a piece of work in 12 hours

A alone can complete 1 piece of work in 5*12=60 hours

B  alone can complete 1/6 of a piece of work in 15 hours.

B alone can complete 1 piece of work in 15*6=90 hours

In how many  hours both working together can complete the work?

A+B=1/60+1/90

A+B=1/180