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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/s

(c)280.0 km/s                                                 (d)56.0 km/s