Question

1. Find the volume of a right circular cylinder if
(i) radius of its base = 7 cm, height =1.5 d (ii) area of base = 154 cm², height = 1,5 cm (iii) circumference of base = 1.32 m, height = 25 cm​

Answer 1

Answer:

1) if h =1.5 cm

volume of cone = 1/3 π r2h

=1/3 * 22/7 * 7*7 *1.5

=77cm3

2)

Area of base=π r2 = 22/7* r2

154*7/22 =r2

49=r2

r=7 CM

then from question no one solution follow I. e

volume=77cm3

3) Circumference of base =2πr

1.32m=132cm

132 = 2* 22/7 * r

132*7/22*2=r

then

r =21cm

now

volume of cone=1/3 *π *21*21*25

=11539.5 cm3