Question

from a cylinder of radius 7cm and height 12cm,a conical cavity of same radius and same height is hollowed out 1) find total surface of solid and 2)volume of solid ​

Answer 1

Step-by-step explanation:

total surface area of a solid=2 πr (r+h)

=2×3.14×7(7+12)

= 43.96×19

= 835.24 cm^2

2- total volume of solid = πr ^2h

= 3.14×7×7×12

= 1846.32cm ^3