Question

Example 2: A car travels a distance
of 75 km in 2 h at a uniform speed.
Express its speed in km/h and m/s.​

Answer 1

Distance = 75km

time = 2 hours

In km/h = 75/2 = 37.5 Km/h

In m/s = 37.5 x 5/18 = 10.41666 = 10.42 m/s

Answer 2

Question

A car travels a distance of 75 km in 2hrs at a uniform speed.

Express its speed in km/h and m/s.

Solution

(i) in km/h

distance (d )= 75 km

time (t )= 2 hrs

$speed \: (s) = \frac{d}{t} \\ </p><p></p><p></p><p> \frac{75 \: km}{2 hrs} \\ </p><p></p><p> \sf= 37.5 km/h$

(ii) in m/s

distance (d) = 75 x 1000 m

time (t) = 2 x 3600 s

$speed \: (s) \: = \frac{d}{t} \\ </p><p></p><p> \frac{75 x \: 1000 \: m}{2 x \: 3600 \: s} \\ </p><p> </p><p> \sf \: = 10.4 m/s$

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