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Ms. Chen can run 5 miles in 2 hours andMs. Assis can run 6.3 miles in 3 hours.Who can run faster? Explain.

Sagot :

Ms. Assis

1) The way to find out who's faster, is to find their unit rates.

2) So, assuming their speed was at a constant rate, throughout the track we can write:

Chen hours

5 miles ------------------2

1 -------------------x

Cross Multiplying those ratios:

5x = 2 Divide both sides by 5

x=2/5

x=0.4 miles per hour

Assis

miles hours

6.3 ----------------- 3

1 -------------------- y

3 =6.3y Divide both sides by 6.3

y=0.47 miles per hour

3) Comparing those unit rates as

0.47 > 0.4

Then we can say that Ms. Assis runs faster than Ms. Chen

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