22 MEN CAN COMPLETE A PIECE OF WORK IN 17 DAYS. THEY WORK FOR 2 DAYS. HOW MANY MORE MEN SHOULD NOW BE EMPLOYED SO AS TO COMPLETE THE WORK IN ANOTHER 10 DAYS?

Answer is 11 more men required.work done by 22 men in two days is 2/17.Remaining work is 1-2/17=15/17.This 15/17 work have to be done in 10 days.So from unitary method we get 22×15/10=33.So the extra men needed is 33-22=11.hence answer is 11