how many cubic metres of earth must be dug out to make 28m deep and 2.8m in diameter
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Answer:
H=28m;
r=1.4m;
earth dug out=volume of cylinder=22/7*r*r*h;
= 22/7*1.4*1.4*28;
=172.48 m^3
hence 172.48m^3 of earth is dug out
The curved surface area of cylinder
=2*22/7*1.4*28;
=246.4
Cost of plastering=4.50*246.4
=Rs 1108.8
Step-by-step explanation:
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