Question

what will be the expense of digging a well of radius 3 metre and depth 7 meter at the rate of 30 per meter cube
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Answer 1

Answer:

Rs. 211.2/- is the Cost of Digging

Step-by-step explanation:

Given,

We know that A well is in the shape of cylinder and the volume for the cylinder is \piπ times square of radius and depth.

Radius (r) for well = 2m

Depth/Altitude of well, h = 14m

The volume of the wall = \pi r^2hπr

2

h

= \frac {22}{7} \times 2 \times 2 \times 14

7

22

×2×2×14

= 176 cm^3cm

3

Answer 2

Answer:

here given that

r=3m

depth= height= 7m

well is cylindrical

therefore

volume of well= volume of cylinder

therefore

volume of cylinder = πr^2 h

= 22/7 ×3×3×7

= 198m^ 3

total amount of digging = 198×30

=₹ 5940