Question

40. A and b can do a work in 4 hours and 12 hours respectively. A starts the work at 6 am and they work alternately for one hour each. When will the work be completed?

Answer 1

Step-by-step explanation:

A can do work in 4hrs

A can do work in 12hrs

a starts work at 6am= 6+4= I0am

therefore a completes work at 10am

now b,they started the work at same time so 6+12=18am