Question

The height of a circular cylinder is 20 cm and the radius of its base is 7 cm. find:(i) the volume(ii) the total surface area.

Answer 1

Step-by-step explanation:

Given-

height = 20cm

radius = 7cm

(i) Volume

v = πr^2h

= (22/7) * 7 * 7 * 20

= 22 * 7 * 20

= 3080cm^2

(ii) Total surface area

T.S.A. = 2πrh + 2πr^2

= 2 * (22/7) * 7 * 20 + 2 * (22/7) * 7 * 7

= 2 * 22 * 20 + 2 * 22 * 7

= 880 + 308

= 1188 cm^2

Answer 2

Answer:

he had explained well

Step-by-step explanation:

u can go through it