(a) 1/2 hour
(b) 3/4 hour
(c) 1 hour
(d) 3/2 hour
(e) 2 hour.
2. A tank is being drained at a constant rate.If it takes 3 hours to drain 6/7 of its capacity, how much longer will it take to drain the tank completely
(a) 1/2 hour
(b) 3/4 hour
(c) 1 hour
(d) 3/2 hour
(e) 2 hours
3. How many litres of a solution that has 30 percent salt must be added to a 50 liters that has 10 percent salt so that the resulting solution has 20 percent salt ?
(a) 20
(b) 30
(c) 40
(d) 50
(e) 60
4. A man can do a piece of work in 5 days. How may days will he take to complete 3 works of the same type?
(a) 10 days
(b) 12 days
(c) 15 days
(d) 18 days
(e) None of these.
5. 16 men can do a piece of work in 10 days. How many men are needed to complete the work in 40 days?
(a) 1
(b) 2
(c) 3
(d) 4
Answers : 4) C
5) D