Question

It costs ₹13200 to paint the inner curved surface of a 10 m deep well. If the rate cost of painting is ₹30 per m2 , find :

(a) inner curved surface area
(b) capacity of the well​

Answer 1

Step-by-step explanation:

Total cost of point=2200Rs.

cost of point/m

2

=20Rs.

depth of cylindrical vessel=10m

Inner curved surface area painted=

cost/m

2

totalcost

=

20

2200

=110m

2

Now, 2πrh=110m

2

2×

7

22

×r×10=110

r=

2×22×10

110×7

=1.75m

∴ radius of the base is 1.75m.