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ICSE Class 7 Answered

the school record for the 4*100 m relay race is 59seconds. When an anchor runner edge the baton, already 45 2/3 seconds are up. At what speed must he run in order to equal the school record?
Asked by surendravmr1 | 17 Dec, 2018, 09:01: PM
answered-by-expert Expert Answer
Time left to make the record equal to school record = begin mathsize 12px style open parentheses 59 space minus space 45 2 over 3 close parentheses space s space equals space 13 1 third space s space equals space 40 over 3 s end style
By assuming that anchor runner has to cover the distance 100 m, required speed = distance / time  = 100 /(40/3) = 7.5 m/s
Answered by Thiyagarajan K | 20 Dec, 2018, 05:21: PM
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