Page 5 - WS2

Question 5:
The radius and height of a cone are in the ratio 4 : 3. The area of the base is 154 cm .
2
What is the area of its curved surface ?
(a) 129.5 cm
2
(b)195.2 cm
2
(c)192.5 cm
2
(d) none of these

Question 6:
The radius and slant height of a cone are in the ratio 4:7. If its curved surface area is
792 cm . Find its radius.
2
(a) 12 cm
(b) 11cm
(c) 13 cm
(d) 10 cm

Question 7:
Curved surface area of a cone of base radius 7 cm is 308 cm , then its slant height is
2
(a) 7 cm
(b) 14 cm
(c) 21 cm
(d) 28 cm

Question 8:
Total surface area of a cone of base radius 7 cm is 462 cm , then its slant height is
2
(a) 14 cm
(b) 28 cm
(c) 12 cm
(d) none of these

Question 9:
A conical tent is 10 m high and the radius of its base is 24 m, then its slant height
(a) 24 m
(b) 25 m
(c) 26 m
(d) none of these

Question 10:
Curved surface area of a cone of base radius 7 m and slant height 25 m is
(a) 550 m 2
(b) 505 m 2
(c) 555 m 2
(d) none of these