(i) How many cubic metres of soil must be dug out to make a well 20 me

1.	(i) How many cubic metres of soil must be dug out to make a well 20 metres deepand 2 metres in diameter?(ii) If the inner curved surface of the well in part (i) above is to be plastered at therate of ₹50 per ma, find the cost of plastering.
Answer» Answer: Given that, HEIGHT(H)=20m diameter (d)=2m radius (r)=2/2=1m Volume of the cylinder=πr²h =3.14×1×1×20 =31.4×2 =62.8m³ The cost of plastering per my=50Rs the cost of plastering for 62.8m³=62.8×50 =628×5=3140Rs Hope it WORKS...............................™✌️✌️

(i) How many cubic metres of soil must be dug out to make a well 20 metres deepand 2 metres in diameter?(ii) If the inner curved surface of the well in part (i) above is to be plastered at therate of ₹50 per ma, find the cost of plastering.

Answer»

Answer:

Given that,

HEIGHT(H)=20m

diameter (d)=2m

radius (r)=2/2=1m

Volume of the cylinder=πr²h

=3.14×1×1×20

=31.4×2

=62.8m³

The cost of plastering per my=50Rs

the cost of plastering for 62.8m³=62.8×50

=628×5=3140Rs

Hope it WORKS...............................™✌️✌️

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(i) How many cubic metres of soil must be dug out to make a well 20 metres deepand 2 metres in diameter?(ii) If the inner curved surface of the well in part (i) above is to be plastered at therate of ₹50 per ma, find the cost of plastering.​

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(i) How many cubic metres of soil must be dug out to make a well 20 metres deepand 2 metres in diameter?(ii) If the inner curved surface of the well in part (i) above is to be plastered at therate of ₹50 per ma, find the cost of plastering.