Question

The cost of sinking tube well is Rs 25 for the first metre and an additional Rs 5 for every subsequent metre.​

Answer 1

Step-by-step explanation:

Hey mate here is your answer.

It is given that

Radius =1.5m

Height =280m

We know that

Volume of the tube well =πr

2

h

By substituting the values

Volume of the tube well =

7

22

×(1.5)

2

×280

So we get

Volume of the tube well =1980 m

3

It is given that

Cost of sinking the tube well =Rs.(15×1980)=Rs.29700We know that

Curved surface area of tube well =2 πrh

By substituting the values

Curved surface area of tube well =2×

7

22

×1.5×280

So we get

Curved surface area of tube well =2640 m

2

It is given that

So the cost of cementing =Rs.(10×2640)=Rs.26400

Therefore, cost of sinking the tube well is Rs.29700 and the cost of cementing is Rs.26400..