Question

10 circular plates,
each of radius 14 cm and thickness 3cm are placed one above the another to form a solid.

Find the volume of the solid​

Answer 1

Answer:

Correct option is

A

9152

Given, radius 14 cm, thickness =3 cm, number of plates =30

Therefore, height of cylinder will be 3×30=90 cm

We know, total surface area of cylinder =2πr(r+h) cm

2

Therefore, total surface area =2π(14)(14+(90))=9152 cm

2