91Ó°ÊÓ

A piece of work can be completed by 10 men and 6 women in 18 days. Men works 9 hours per day while women works \(7.5\) hours per day. Per hour efficiency of a woman is \(\frac{2}{3}\) rd of man's efficiency. In how many days 10 men and 9 women complete the work? (a) 16 days (b) 20 days (c) 30 days (d) 25 days

A cistern has a leak which would empty it in 6 hours. A tap is turned on which fills the cistern @ 10 liters per hour and then it is emptied in 15 hours. What is the capacity of the cistern? (a) 100 litres (b) \(166.66\) litres (c) \(60.66\) litres (d) none of these