Mathematics, 14.12.2021 21:50 ruleolivas
Lena is competing in a 400 m race. She runs at a constant speed of 4.7 m/s for the first 150 m, then 4.1 m/s for 30 seconds. The remainder of the race takes her 42 seconds to complete. What is Lena's average speed for the entire race to 1 dp?
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Lena is competing in a 400 m race. She runs at a constant speed of 4.7 m/s for the first 150 m, then...
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