1. A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets into it. The mass of the man is : (b)
(a) 50 kg
(b) 60 kg
(c) 70 kg
(d) 80 kg
2.The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find the ratio of its diameter to its height. (b)
(a) 3 : 7
(b) 7 : 3
(c) 6 : 7
(d) 7 : 6
3. A swimming pool 9 m wide and 12 m long is 1 m deep on the shallow side and 4 m deep on the deeper side. Its volume is: (c)
(a) 260
(b) 262
(c) 270
(d) 272
4. The cost of the paint is Rs. 36.50 per kg. If 1 kg of paint covers 16 square feet, how much will it cost to paint outside of a cube having 8 feet each side. (c)
(a) Rs. 850
(b) Rs. 860
(c) Rs. 876
(d) Rs. 886
5.In a shower, 5 cm of rain falls. The volume of water that falls on 1.5 hectares of ground is: (b)
(a) 75 cu. m
(b) 750 cu. m
(c) 7500 cu. m
(d) 75000 cu. m