Question

19. The inner diameter of a circular well is 3.5m. it is 10m deep.
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Answer 1

Solution : -

Given : inner diameter = 3.5 m

or radius = 3.5 / 2 = 1.5 m and

height = 10 m

Inner cured surface area of the well = 2πrh

= 2 ✖ 22 / 7 ✖1.75 ✖ 10

= 770/ 7

$110 \: m \:^{2}$

Ineer cured surface area of the well is

$110 \: m ^{2}$