A runner completes 400 metres in 50 seconds. Another runner completes the same distance in 45 seconds. Class 7
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A runner completes 400 metres in 50 seconds. Another runner completes the same distance in 45 seconds. Class 7
A runner completes 400 metres in 50 seconds. Another runner completes the same distance in 45 seconds. Who has a greater speed and by how much? Class 7
Answer:
Runner 1:
Distance = 400 m
Time = 50 s
Speed = [latex]\frac{\text { Distance covered }}{\text { Time taken }}[/latex]
=[latex]\frac{400 \mathrm{~m}}{50 \mathrm{~s}}[/latex]=8 m/s
Runner 2:
Distance =400m
Time = 50s
Speed = [latex]\frac{\text { Distance covered }}{\text { Time taken }} [/latex]
= [latex]\frac{400 \mathrm{~m}}{45 \mathrm{~s}}[/latex] = 8.89m/s
Difference =8.89-8=0.89 m/s
Runner 2 has greater speed. It is approximately 0.89m/s greater speed.