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Q.

The speed of a moving car is 72 km/h. calculate its speed in m/s.

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a

20 m/s

b

18 m/s

c

30 m/s

d

None of these

answer is A.

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Detailed Solution

Concept- A automobile traveling at 72 km/h is provided as the answer to the inquiry.
Please determine the vehicle's m/s speed.
Knowing that 1000 meters equals one kilometer.
Hence, to convert kilometers into meters we need to multiply the value in kilometers with 1000.
We also know that 1 hour is 60 minutes and 60 minutes is

60 × 60 = 3600 s e c 60 × 60 = 3600 s e c

.
Hence, to convert hour to meter we need to multiply the value in hour with 3600.
Therefore,
To convert km/h into m/s we need to multiply the value in km/h with

\frac{1000}{3600}

Thus,
In this instance, the car's speed is 72 km/h.
Therefore,
To calculate the speed in m/s we need to multiply 72 km/h with with

\frac{1000}{3600}

i.e 72 km/hr = 72

\times \frac{1000}{3600}

⇒ 72 k m / h = 20 m / s

As a result, the vehicle's speed in m/s.

20 m / s

.
Hence, the correct option is 1.

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