Page 5 - Acticity- 1-SA of cylinder

(c) 22 cm
(d) none of these

Question 5:
The radius and height of a cylinder are in the ratio 5 : 7 and its curved surface area is
220 cm . The radius and height are respectively
2
(a) 5 cm and 7 cm
(b) 7 cm and 5 cm
(c) 5 cm and 5 cm
(d) 1 cm and 7 cm

Question 6:
The curved surface area of a cylinder is 1000 cm and its diameter is 20 cm. The height
2
of the cylinder is
(a) 15.9 cm
(b) 15.8 cm
(c) 19.5 cm
(d) none of these

Question 7:
Find the curved surface area of a right circular cylinder of height 14 cm and base radius
1 cm.
(a) 88 cm 2
(b) 80 cm 2
(c) 82 cm 2
(d) 84 cm 2

Question 8:
What is the height of a cylinder of base radius as 1 cm and curved surface area as 88
cm ?
2
(a) 11 cm
(b) 14 cm
(c) 44 cm
(d) none of these

Question 9:
A metal pipe is 77 cm long. The inner diameter of a cross-section is 4 cm, the outer
diameter being 4.4 cm. Its outer curved surface area is
(a) 1064.8 cm 2
(b) 1406.8 cm 2
(c) 1460.8 cm 2
(d) none of these