Question

The lateral surface area of a hollow cylinder is 1320 cm².The radius of it‘s base is 7cm. Find the height and volume of the cylinder. *​

Answer 1

Answer:

CSA of cylinder = 1320 cm²

Step-by-step explanation:

step 1. CSA of cylinder = 2πrh

1320 = 2 × 22/7 × 7 × h

1320/2 = 22 × h ( because 7 and 7 has been simplified )

660 = 22 × h

660/22 = h

30 cm = h

Volume of cylinder = πr²h

= 22/7 × 7×7 × 30 ( 7 and 7 will be simplified and one 7 will remain)

= 22× 7 ×30

= 4620 cm³

Therefore the height of cylinder is 30 cm

and volume of cylinder is 4620 cm³