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Kay [80]
3 years ago
15

7. The speed of one car is 20% less than the speed of a second car. What per cent more time does the first car need to travel th

e same route as the second car?
Mathematics
1 answer:
9966 [12]3 years ago
7 0

Answer:

25% or more

Step-by-step explanation:

t1 = d1/v1 , t2 = d2/v2.

d1 = d2 , and v1 = 0.8 v2

t1 / t2 = d1/d2 x v2/v1 = v2/v1 ( as d1 = d2 )

t1/t2 = v2 / v1 = v2/0.8 v2 = 1/0.8 = 1.25

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