8. A car travels 85 km in 51 minutes. (a) How far does it travel in 1 hour at the same speed? (b) How many seconds does it take to travel 510 m? step by step answer plz

Question

asked Oct 8, 2022 150k views

1 Answer

Babak Fakhriloo · Answer 1 · 2022-10-13T17:54:04+0000

Part A

(85 km)/(51 min) = (x km)/(60 min)

85/51 = x/60

85*60 = 51x

5100 = 51x

51x = 5100

x = 5100/51

x = 100

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Part B

510 m = 0.510 km

(85 km)/(51 min) = (0.510 km)/(x min)

85/51 = 0.510/x

85x = 51*0.510

85x = 26.01

x = 26.01/85

x = 0.306

This represents the number of minutes. Multiply by 60 to get the number of seconds

0.306 min = 0.306*60 = 18.36