Question

find the radius of lateral surface area and total surface area of cube
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Answer 1

Answer:

Given s= 7m, h=9 m

Lateral surface area = Area of the curved surface =2πrh=2×722×7m×9m=396m2

Total surface area = Area of curved surface + Area of two circular surfaces

=2πrh+2πr2=396m2+2×722×7m×7m=(396+308)m2=704m2

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Answer 2

Answer:

Correct option is

C

396 m, 704m

Given s= 7m, h=9 m

Lateral surface area = Area of the curved surface =2πrh=2×

7

22

×7m×9m=396m

2

Total surface area = Area of curved surface + Area of two circular surfaces

=2πrh+2πr

2

=396m

2

+2×

7

22

×7m×7m=(396+308)m

2

=704m

2