Question

find the curved surface area and total surface area of a right circular cylinder whose height is 15 cm and the radius of the base is 7 cm​

Answer 1

Answer:

curved surface area =660sqcm

total surface area =968 sqcm

Step-by-step explanation:

h=15cm

r=7 cm

curved surface area of cylinder is

$s = 2\pi \: rh \\ = 2 \times \frac{22}{7} \times 7 \times 15 \\ = 2 \times 22 \times 15 \\ = 660sqcm$

$total \: surface \: area = 2\pi \: rh(h + r) \\ = 2 \times \frac{22}{7} \times 7 \times (15 + 7) \\ = 2 \times 22 \times 22 \\ = 968sqcm$