Question

hlo frnds this is a question.

Answer 1

Cuboid
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Length , l = 1.5 metres

Breadth , b = 1.5 metres

Height , h = 7 metres

Volume of the cuboidal well = lbh

= 1.5 × 1.5 ×7

= 15.75 m³

Rate of digging 1 m³ = Rs 75

Cost of digging = Volume × rate

= 15.75 × 75

= Rs 1181.25

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Cylinder

Radius , r = 75 cm = 0.75 metres

Height = h = 7 metres

Volume = πr²h = 22/7 × 0.75 × 0.75 × 7
= 12.375 m³

Cost of digging = Volume × rate

= 12.375 × 75

= Rs 928.125
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The value depicted is that he saved money by digging the well in the shape of cylinder