निम्नलिखित रिक्त

‘M’ alone can complete a work in 18 days. ‘N’ is 50% as efficient as ‘M’. How long will they take to complete the work together?

A man is thrice as fast as a women and a woman is twice as fast as a boy. If all of them can do a work in 18 days. than a boy can do the work in?

Anil and Ashish receive Rs.1200 for work of 8 days. If Anil is 5 times efficient than Ashish, then find the daily wage received by Ashish.

A can do a piece of work in 40 days. A is 25% more eicient than B. In how many days the work gets completed when both of them work together?