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प्रश्न
Which is a greater speed of 45 km/h or speed of 12.25 m/sec?
How much is the distance travelled by each in 2 seconds?
उत्तर
First speed = 45 km/h
Second = 12.25 m/sec
= `(12.25xx60xx60)/1000` km/h
= `(1225xx60xx60)/(100xx1000)`
= `441/10`
= 44.1 km/h
It is clear from above that 45 km/h is greater.
distance covered in 2 seconds by 45 km/h
Speed = `(45xx1000xx2)/(60xx60)` = 25 m
and distance covered in 2 seconds by 12.25 m/sec = 12.25 × 2 = 24.50
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