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sineoko [7]
3 years ago
9

A runner ran 20 miles in 150 minutes.

Mathematics
2 answers:
cestrela7 [59]3 years ago
7 0

Answer:

a) 45 minutes

b) 2 miles

c) 8 miles per hour

d) 7.5 minutes per mile

Step-by-step explanation:

a) (150/20) x 6 = 45 minutes

b) (20/150)(15) = 2 miles

c) (20/150)(60) = 8 miles per hour

d) 150/20 = 7.5 minutes per mile

Zina [86]3 years ago
7 0

Answer:

<em>Use ratios and cross multiplication to solve this</em>

  • 20 miles ⇔ 150 minutes

a.

  • 20 miles ⇔ 150 minutes
  • 6 miles ⇔ x minutes
  • 20x = 150*6
  • x = 900/20
  • x = 45 minutes

b.

  • 6 miles ⇔ 45 minutes
  • x miles ⇔ 15 minutes
  • x = 6*15/45
  • x = 2 miles

c.

  • 2 miles ⇔ 15 minutes
  • x miles ⇔ 1 hour = 60 min
  • x = 2*4 = 8 miles per hour

d.

  • 2 miles ⇔ 15 minutes
  • 1 mile ⇔ x minutes
  • x = 15/2 = 7.5 minutes per mile
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