Question

A is 20 more efficient than b if b alone can complete a work in 12 days the a can complete some work in how much days

Answer 1

according to the question a can do a job

in 12 days ,that means a can do one twelfth of the total work in one day

sa A one day work i.e kewal to 1/12

B is 60percent more efficient than A

so B can do 60 percent mire work than what a do in one day

B one work is equal to 1/12+60 (1/12)

i.e 1/ 12+1|20 taking lcm of 12 and 20

which is 60

B one day work is 1/7.5