RRB JE 23rd May 2019 Shift-3

Question 57

If the surface area of a cube is 3750 cm², then find its volume.

Solution

$$Surface\ area\ of\ cube=6a^2=3750\ cm^2.$$

So,$$a^2=\frac{3750}{6}\ cm^2=625.$$

or,$$a=25.$$

So, $$Volume=a^3=25^3=15625.$$

B is correct choice.

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