Question

- If 'A' can do piece of work in 30 days while 'B'
alone can do it in 40 days. In how many days
can A & B complete this work together.
a) 16 1/7.
b) 171/7
c) 18 1/7
d) 19 1/7​

Answer 1

Answer:

A -

one day work =1/30

B-

one day work =1/40

A and B

one day work = 1/30+1/40=7/120

no.of days both will take together to complete this work = 120/7= days