Question

The volume of a right circular cylinder is 448pie cm square and height is 7 cm find the lateral surface area and total surface area.

Answer 1

Hi ,

Let r , h are radius and height of the

circular cylider ,

h = 7 cm ,

Volume of the cylider = 448π

π r² h = 448π

π r² × 7 = 448π

r² = ( 448π )/( π × 7 )

= 64

r = √64 = 8 cm

i ) Lateral surface area = 2πrh

= 2 × 22/7 × 8 × 7

= 352 square cm

ii ) Total surface area = 2πr( h + r )

= 2× 22/7 × 8 [ 7 + 8 ]

= ( 2 × 22 × 8 × 15 ) / 7

= 5280/7

≈ 754.28 square cm

I hope this helps you.

: )

Answer 2

I hope it will help you
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