Question

7. In a race, a runner covered 3.5 km in
7 minutes. What was his speed in km/hour?​

Answer 1

Step-by-step explanation:

3.5 km in 7 min

1min he will cover = 3.5 ÷7 =

0.5 km

hence in 60 min he will cover= 60 ×0.5 km/HR

= 30km/hr

Answer 2

Step-by-step explanation:

given

covered distance by a runner is 3.5km/h

in 7m

we know that,

1m=60second

7m=420second

1km=1000m

3.5km=3500m

so,

speed=D/T

=3500/420*18/5

=30km/h

hence the speed of runner is 30km/h

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