Question

If the total cost for painting the inner curved-surface of a cylindrical vessel 10m deep at the rate of Rs. 10 per m², then inner curved surface area of the vessel will be​

Answer 1

Answer:

2200

Step-by-step explanation:

. Find capacity of the vessel

Total cost of point=2200Rs.

cost of point/m

2

=20Rs.

depth of 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.

capacity of vessel=πr

2

h=

7

22

×1.75×1.75×10

=96.25m

3

Answer 2

painting the inner curved-surface of a cylindrical vessel 10m deep at the rate of Rs. 10 per m², then inner curved surface area of the vessel will be