Question

A carpenter can do a job in eight hours. His assistant can do the same job in ten hours. How loog wolild it take them to do the job together:,

Answer 1

Time taken by carpenter to complete the job = 8 hours

Job done by carpenter in 1 hour = 1/8

Time taken by assistant to complete the job = 10 hours

Job done by him in 1 hour = 1/10

Step-by-step explanation:

If both of them work together , job done by them in one hour = 1/8 + 1/10

5 + 4/40

9/40

Time taken by both to complete the job =

40/9

=4*4/9 hours

=4.444 hours

Hope it helps