A solid rod consists of a cylinder of height 20 cm and radius 7 cm. It is surmounted by another solid cylinder of height 10 cm and radius 3.5 cm. If 1 cubic metre of rod weighs 10000 kg, what is the mass of the rod? (use π = 22/7)
1
34.65 kg
2
31.56 kg
3
3.456 kg
4
3.156 kg