Question

A cylinder well is 21 m deep its outer and inner diameter are 21 m and 14 m respectively find the cost of renovating the inner curved surfaces and outer curved surface at the rate of 25 per m

Answer 1

This is the answer Hope it helps you

Answer 2

ANS :

DIAMETERS = 21 M AND 14 M

RADIUS = 21/2 M AND 7 M

CSA OF INNER AND OUTER SURFACE :

2π (R²+ r²)h

2 x 22/7 x (21/2+7) 21

2310 m²

cost = 2310 * 25

= 57750/-

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