diameter of a well is 2.1 and is 14 deep find the cost of plastering it at rupees 8 per metre square
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Answer:
cost of plastering ₹794.64
Step-by-step explanation:
diameter of the well=2.1m
radius=2.1/2
=1.05m
let the height be the deep of the well.
TSA=2πr(h+r)
=2×22/7×1.05(14+1.05)
=44/7×1.05(15.05)
=46.2/7×15.05
=695.31/7
=99.33m²
cost of plastering=8×99.33
=₹794.64
please mark as brainlist answer.
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