A car covers a distance in 30 minutes with an average speed of 50 km per hour. What must be the average speed by the car to cover the same distance in 60 minutes?
A. 10
B. 12
C. 20
D. 25
A. 10
B. 12
C. 20
D. 25
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Answer:
D. 25
Step-by-step explanation:
30:50 = 60:n
This is an example of inverse proportion.
(30)(50) = (60)(n)
1500 = 60n
n = 25