The escape velocity for the earth is 11.2 km/sec. The mass of another planet is 100 times that of the earth and its radius is 4 times that of the earth. The escape velocity for this planet will be
(a) 112.0 km/s (b) 5.6 km/
(c) 280.0 km/s (d) 56.0 km/s
Answer: d
(8)