Question

Andre can run 5 miles in 40 minutes. At that rate of speed, how long would it take him to run 10 kilometers? Use the conversion factor 1 mile ≈ 1.61 kilometers. A.8 minutes B.50 minutes C.64 minutes D.80 minutes

Answer 1

50 minutes = B

Explanation:

Andre can run 5 miles in 40 minutes

for 1 miles = 40/5 = 8 minutes

• for 10 kilometres

1 mile = 1.61 kilometres

x = 10 kilometres

x= (10x1)/1.61= 10/1.61 = 6.21miles

• for 1 miles = 40/5 = 8 minutes
• 6.21 miles = 8 x 6.21 = 49.689 minutes ≈ 50 minutes = B