Question

From a rectangular solid of metal 42cm by 30cm by 20cm a conical cavity of diameter 14cm and depth 24cm is drilled out. Find (i) the surface area of remaining solid, (ii) the volume of the remaining solid, (iii) the weight if the material drilled out if it weights 7g per cm square

Answer 1

Answer-

(1)5400-44root193 cm sq.

(2)25200-1232=13968

(3)308root193gram