The velocity of the car is 18 ms-1. Express this velocity in kmh-1

1.	The velocity of the car is 18 ms-1. Express this velocity in kmh-1
Answer» Given: Velocity of Car = 18 ms^-1 To express this velocity in kmh^-1 we need the conversion factor which is calculated as under: 1 km = 1000 m So, 1 m = \(\frac{1}{1000}\) km Now, 1 hr = 60 minutes = 60 × 60 s = 3600 s So, 1 s = \(\frac{1}{3600}\) hr Now, Velocity of car = 18 \(\frac{m}{s}\) = 18 \(\frac{km}{1000}\) × \(\frac{3600}{hr}\) = \(\frac{18\times36}{10}\) kmh⁻¹ = 64.8 kmh⁻¹

Answer»

Given:

Velocity of Car = 18 ms^-1

To express this velocity in kmh^-1 we need the conversion factor which is calculated as under:

1 km = 1000 m

So, 1 m = \(\frac{1}{1000}\) km

Now, 1 hr = 60 minutes = 60 × 60 s = 3600 s

So, 1 s = \(\frac{1}{3600}\) hr

Now, Velocity of car = 18 \(\frac{m}{s}\)

= 18 \(\frac{km}{1000}\) × \(\frac{3600}{hr}\)

= \(\frac{18\times36}{10}\) kmh⁻¹

= 64.8 kmh⁻¹

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