Question

The cost of an AC is rupees 16,500 . 12% vat is chargeable . Find the amount chargeable

Answer 1

Answer:

Time taken is 20 seconds.

Explanation:

To find :

Time taken by the body.

We have,

If body starts from rest. Then, Initial velocity, u is 0 m/s.

Acceleration, a is 5 m/s²

Distance, s is 1 km.

Conversion :

• Distance = 1 km

1 km = 1000 m

So, Distance, s is 1000 m .

We know,

Second equation of motion :

• s = ut + 1/2 at²

[Where, s is distance, u is Initial velocity, t is time taken and a is acceleration]

Put s, u and a in equation :

\implies⟹ 1000 = (0 × t) + 1/2 × 5 × t²

\implies⟹ 1000 = 0 + 5/2 × t²

\implies⟹ 1000 × 2 = 5 × t²

\implies⟹ 2000 = 5t²

\implies⟹ t² = 2000/5

\implies⟹ t² = 400

\implies⟹ t = √400

\implies⟹ t = 20

Thus,

Time taken by body is 20 seconds.