Question

A meteorist is moving with a constant speed of 45km/hr then how distance will be covered by him in 1) one minute 2)one hour 3)one second ???

Answer 1

Answer:

converting km/hr into m/sec

45×5/18=12.5m/s

Explanation:

speed=distance/time

1. 12.5=d/60(1min =60 sec)

d=750m

2. 12.5=d/60×60

d=45000m or 45km

3.d=12.5m

Answer 2

A meteorist is moving with a constant speed of 45 km/hr then how distance will be covered by him in 1) one minute 2)one hour 3)one second is 750 m, 45000 m, 12.5 m respectively.

Explanation:

Given: Speed = 45 km/hr

Distance = ?

Time = 1 min, 1 hour, one second.

1 minute = 60 seconds. 60 minutes = 1 hour.

We know the formula, Distance = Speed X Time.

First case: Speed = 45 km/hr, Time = 1 minute

Converting km/hr into m/sec. we get 45 km/hr = 45 x $\frac{5}{8}$ = 12.5 m/sec.

Distance covered = 12.5 x 60 = 750 m.

Second case: Speed = 45 km/hr, Time = 1 hour

Distance covered = 12.5 x 60 x 60 = 45000 m.

Third case: Speed = 45 km/hr, Time = one second

Distance covered = 12.5 x 1 = 12.5 m.

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