Ramesh could run a 100m race in 20 seconds. After training he can finish the race in 15 seconds. By how much has he improved his speed?
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Answer:
1.67m/s
Step-by-step explanation:
earlier 100m in 20s
speed = distance/time
= 100m / 20s
= 5m/s
after training
speed = 100m / 15s
= 6.67m/s
improvement = 6.67 - 5
= 1.67m/s
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