Earth’s radius may be taken as

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

6400\,\text{km}

. To what depth below the surface must a body be taken so that the acceleration due to gravity at that point becomes

75\%

of its surface value? (a)

4800\,\text{km}

(b)

1600\,\text{km}

(c)

800\,\text{km}

(d)

3200\,\text{km}