Question

(i) find the time taken to cover a distance of 120km at the speed of 10m/sec (ii) find the time taken to cover a distance of 660 m at the speed of 72km/hr

Answer 1

Hi ,

We know that ,
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Time ( t ) = distance ( d ) / speed ( s )

t = d / t
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i ) d = 120km

= 120 × 1000m

d = 120000 m

S = 10m /sec

t = d / s

t = 12000 / 10

t = 1200 sec

ii ) d = 660m

s = 72 km/hr

= 72 × 1000 m / 3600 sec

= 20 m /sec

t = d / s

t = 660 / 20

t = 33 sec

I hope this helps you.

:)