Question

the height of a cylinder is 15 cm and curved surface area is 1320 cm2 .find its radius​

Answer 1

Step-by-step explanation:

Given: h=15cm

csa=1320 cm^2

we know that the formula for the csa of cylinder is 2πrh

So 2πrh=1320 cm^2

=> 2×22/7×r×15=1320

=>660/7×r=1320

=>r=1320×7÷660

=>r=14

.·. The radius of the cylinder is 14 cm

Answer 2

Answer:

14 cm

Step-by-step explanation:

Let the radius of the cylinder= r cm

height of the cylinder,h=15 cm

now,

curved surface area of a cylinder = 2πrh

or, 1320 = 2× (22/7) × r × 15

or, r = 1320×7 ÷ ( 2×22×15)

or, r = 14

so, the radius of the cylinder is 14 cm

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