Question

A is thrice as efficient as b a started work and after 4 days he was replaced by b b then worked for 15 days and left if a and b together finished 75% of total work in how man days can b alone can finish the work

Answer 1

Answer:

B then worked for 15 days and left. If A and B together finished 75% of the total work, in how many days B alone can finish the whole work ? Answer: D-36 days