A gas tank consists of a cylinder with a hemisphere on top. It's made of metal that is 1cm thick. It has an overall height of 90cm and an external diameter of 20cm. Calculate
a) the surface area of the tank
b) the internal volume of the tank

Pls show full working out ty

Respuesta :

B) the internal volume of a tank

1 x 90 x 20 = ?

V = ?