Question

Write an essay in hindi on “Alternative sources of energy” and their usefulness.

Answer 1

Explanation:

The present store of Coal and Petroleum will be completely exhausted within a few years.

The present store of Coal and Petroleum will be completely exhausted within a few years.The alternative sources may be Atom derived energy or the energy from natural resources like air, water, Sunlight etc.

The present store of Coal and Petroleum will be completely exhausted within a few years.The alternative sources may be Atom derived energy or the energy from natural resources like air, water, Sunlight etc.Some of them are already in use at very limited scale.

The present store of Coal and Petroleum will be completely exhausted within a few years.The alternative sources may be Atom derived energy or the energy from natural resources like air, water, Sunlight etc.Some of them are already in use at very limited scale.Some are having bi products with severe effects on environment

Answer 2

Explanation:

$answer$

$= {2}^{2} \times {4}^{2} \times {8}^{2}$

$= 2 \times 2 \times 4 \times 4 \times 8 \times 8$

$= 4 \times 16 \times 64$

$= 981$

Therefore, the correct answer is 981.