Question

Q A rectangle sheet of dimensiouns 44 cm x 7cm is rotated about its long side Find the volume and the total surface area of the soild these generated
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Answer 1

THE SOLID WILL BE CYLINDER

Radius will be 7cm

Height will be 25cm

VOLUME = πr^2h

= 22/7×7×7×25

= 22×7×25

= 3850cm^3

TSA = 2πr(h+r)

= 2×22/7×7(25+7)

= 44(32)

= 1408cm^2

CSA = 2πrh

= 2×22/7×7×25

= 44×25

= 1100cm^2