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faust18 [17]
4 years ago
13

Please help ty!

Mathematics
1 answer:
Gala2k [10]4 years ago
3 0

50 seconds

Recall the equation

d=rt

Distance = rates times time.

We have a single distance, 400m

We have two different rates 1 1/3 m/s and 1.6 m/s

Let's calculate the time for each rate

t = d/r

t = 400/(1 1/3) = 300 seconds

t = 400/1.6 = 250 seconds

By increasing his average speed, Alex will reduce his time by

300-250 = 50 seconds.

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