Question

9. A is able to complete of a certain work in 10 hrs and B is able to complete
3
5
the same work in 12 hrs.
Find : (i) how much work can A do in 1 hour ?
(ii) how much work can B do in 1 hour ?
(iii) in how much time will the work be completed, if both work together?​

Answer 1

Answer:

(i)1/10

(ii)1/12

(iii) 5  5/11

Step-by-step explanation:

Given,

A is able to complete of a certain work in 10 hrs

(i) how much work can A do in 1 hour ?

we know,

work=men*hours*days

1 work=10 hours

A' 1 hours work is =1/10 work

B is able to complete   the same work in 12 hrs.

B=1/12

(iii) in how much time will the work be completed, if both work together?​

A+B=1/10+1/12

A+B=11/60

A+B=5 5/11