Question

the cost of painting a conical water tank externally at the rate of 16 per.sq.m is RS 2464 . find the radius of the tank ,π=3.14​

Answer 1

Answer:

Hope this helps you .

Step-by-step explanation:

Rs.1526 is spent to a paint a sphere at the rate of Rs.6/m

2

.

Area of region painted at the cost of Rs.6=1m

2

Area of the region painted for Rs.1526=

6

1526

=

3

763

m

2

Surface area of the sphere =4πr

2

⇒

3

763

=4×3.14×r

2

⇒r

2

=

3

763

×

4×3.14

1

⇒r

2

=20.25

⇒r=4.5cm