A particle is projected from the surface of the earth with an initial speed of 4 km/s. The maximum height attained by the particle is

Q: A particle is projected from the surface of the earth with an initial speed of 4 km/s. The maximum height attained by the particle is (Given, radius of the earth = 6400 km, g = 9.8 ms-2)

(a) 935 km

(b) 935 km

(c) 735 km

(d) 1035 km

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Ans: (b)