Question

From a cube of side 8m, a conical cavity is cut out with radius 3.5 m and height 4m. What is the cost of painting the solid at the rate of Rs. 2 per m®? (A) Rs. 822 (B) Rs. 411 (C) Rs. 615 (D) Cannot be calculated​

Answer 1

Answer:

kept for example

Step-by-step explanation:

Volume of the Cube =a

3

, (Where a=7 cm)

V=(7)

3

V=343cm

3

Volume of conical cavity (V)=

3

1

πr

2

h

V=

3

1

×3.14×3

2

×7

V=65.94cm

3

Volume of the remaining solid (V

r

)=Volume of the Cube-Volume of conical cavity

V

r

=343−65.94=277.60cm

3