Mental Ability-4

(C.S.P.E. 2000)

1. A rectangular water tank measures 15 m x 6 m at top and is 10 m deep. It is full of Water. If water is drawn out lowering the level by 1 metre, how much water has been drawn out?
a) 90,000 litres, b) 45,000 litres, c) 4,500 litres, d) 900 litres

2. An accurate clock shows 8 o'clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 2 o'clock in the afternoon?
a) 150º b) 144º c) 168º d) 180º

3. The monthly income of Komal and Asha are in the ratio of 4:3. Their monthly expenses are in the ration of 3:2. However, both save Rs. 600 per month. What is their total monthly income?
a) Rs. 8,400/-, b) Rs. 5,600/-, c) 4,200/-, d) 2,800/-

4. If X= -2, then X3(cube) -X2(square)-X-1 is equal to, a) 1, b)-3, c) -11, d) -15

5.



Answers:-

1. (a): 1 letre = 100 cu.cm., Water drawn out=15x6x1=90 sq.m.
2. (d)
3. (c): Let the total monthly income of Komal and Asha respectively be 4k and 3k. Suppose their expenses are 3l and 2l respectively. Therefore 4k-3l=600 and 3k-2l=600, implies k=600 and l=600, implies Total income of komal and Asha = 7k= 4200.
4. (c)