Question

M works twice as fast as N. If N can complete a piece of work independently in 36
days. Find in how many days Mand N working together can complete the work ?
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Answer 1

Step-by-step explanation:

Ratio of rates of working of M and N = 2 : 1.

So, ratio of times taken = 1 : 2

N's one day's work = 1/36

∴M's one day's work= 1/18 (2 times the work of N)

(M+N)'s one day's work= 1/18 + 1/36 = 3/36 = 1/12

Therefore, M and N together can finish the work in 12 days.