1. The ratio of the radius and height of a cone is 5 : 12. Its volume is 314(2/7) cm. Its slant height is
(a) 13 cm
(b) 14 cm
(c) 17 cm
(d) 26 cm
2. The height of a right circular cone is 84 cm and its base radius is 3.5 cm. Its volume is
(a) 3234 cm^3
(b) 1078 cm^3
(c) 2156 cm^3
(d) 2496 cm^3
3. A cone of height 15 cm and base diameter 30 cm is carved out of a wooden sphere of radius 15 cm. The percentage of wasted wood is
(a) 75%
(b) 50%
(c) 40%
(d) 25%
4. The length of canvas 12 m wide required to build a conical tent of height 14 m and the floor area 346.5 m^2, is
(a) 665 m
(b) 770 m
(c) 490 m
(d) 860 m
5. The sum of the radius of base and the height of a cylinder is 37 m. If the total surface area of the cylinder is 1628 m^2. Then its volume is
(a) 5240 m^3
(b) 4620 m^3
(c) 3180 m^3
(d) None of these
6. 0.88 cm^3 of iron is melted and moulded in the form of iron rods, each of diameter 2 cm and length 7 m. How many rods are formed ?
(a) 400
(b) 392
(c) 616
(d) 2000
Answers Key
1.(a)
2.(b)
3.(a)
4.(b)
5.(b)
6.(a)
7.(d)
8.(c)
9.(c)
10.(a)
1.(a)
2.(b)
3.(a)
4.(b)
5.(b)
6.(a)
7.(d)
8.(c)
9.(c)
10.(a)
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