Question

a car moves a distance of 400 metre in 30 seconds what is it's speed in km/hrs​

Answer 1

$Speed= 400 m./20 s. , [ 1 km=1000m. and 1hour = 3600 seconds.]</p><p></p><p>Speed = (400/1000)km/(20/3600)h.</p><p></p><p>= (400×3600)km/(1000×20)h.</p><p></p><p>=(2×36)km/h.</p><p></p><p>= 72 km/h. Answer.</p><p></p><p>$

Answer 2

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Ved Prakash Sharma

, former Lecturer at Sbm Inter College, Rishikesh (1971-2007)

Answered May 14, 2019

Speed= 400 m./20 s. , [ 1 km=1000m. and 1hour = 3600 seconds.]

Speed = (400/1000)km/(20/3600)h.

= (400×3600)km/(1000×20)h.

=(2×36)km/h.

= 72 km/h. Answer.

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