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Answer:
It will take 4.5hrs to cover the same distance
The constant of variation,k=252
Step by step explanation
Given that,
From the question
Time=4hr
Speed=63km
By substitution we obtain,
Cross multiplying we get,
Now,
speed=56km
Distance Covered=252km
By substitution:
We obtain,
Cross multiply
Divide through by 56
From the formula,
Which means that, speed and time varies inversely.
Let k be variation constant
This implies that
Taken,
Time=4hrs
speed=56km