Question

MU the
are
volume of the cylinder
2. Find the volume of a right circular cylinder, if the radius (r) of its base and its altitude (h)
(a) r = 7 cm, h = 15 cm
(b) r = 2.8 m, h = 15 m
3. Find the volume of a cylinder, if the diameter (d) of its base and its altitude (h) are :
(a) d = 21 cm, h = 20 cm
(b) d = 7 m, h = 12 m
4 The circumfe
ample 1
ght an
ution :​

Answer 1

2. (a) r = 7cm, h = 15 cm

Volume of cylinder = πr²h

= 22/7×7×7×15

= 2310 cm³

(b) r =2.8 m, h = 15 m

Volume of cylinder = πr²h

= 22/7×2.8×2.8×15

= 369.6 m³

3. (a) d = 21 cm

r = d/2 = 21/2 cm, h = 20 cm

Volume of cylinder = πr²h

= 22/7×21/2×21/2×20

= 13860 cm³

(b) d= 7 m

r = 7/2 m, h = 12 m

Volume of cylinder = πr²h

= 22/7×7/2×7/2×12

= 462 m³