Two buses leave a corner at the same time. One bus goes uptown at a constant rate of 25 mph, the other downtown at a rate of 15
mph. How long will it take the buses to be 30 miles apart?
A. 20 minutes
B. 30 minutes
C. 45 minutes
D. 1 hour and 15 minutes
2 answers:
Answer:
45 minutes
Step-by-step explanation:
the answer is c
The rate of separation = 25 + 15 = 40 mph
speed = distance / time
40 = 30 / t
t = 30/40 hour = 45 minutes
Its C.
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You need to make a proportion.
45 X
------ -----
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45 x 408 is 21600 ÷ 100 is 216.
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