Question

A student has to reach his school in 15 minutes.if the school is 800 metres away, at what speed should he walk?

Answer 1

Hey there!

In this question,
Distance is 800 m.
Time is 15 min or 15×60 or 900 sec.

Speed is Distance ÷ Time
Or 800÷900
Or 0.8888888889 meters per second.

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Answer 2

Time = 15 min = 1/4hr 0.25 hr
Distance = 800m = 0.8km

Speed = distance / time
= 0.8/0.25
= 8/10÷25/100
= 8/10×100/25
= 800/250
= 3.2

Hence,
Speed = 3.2km/hr

3.2×1000/60 = 53.33 meter/min

3.2×1000/60×60 = 0.88 m/sec = 88cm/sec