Question

A candig 1/a part of a field in 20 hours whive A and B
togetherdig complete field in 60 hour then find how
many parts of field B candig alone in 20 hours.​

Answer 1

Step-by-step explanation:

A 1/a work in 20hrs

in 1 hr A digs 1/20a part

A+B 1 work in 60hrs

in 1 hr A+B digs 1/60 part

Bs work in 1hr=1/60 - 1/20a = a-3/60a

In 20 hrs it digs (a-3)/3a part of field