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Choose the correct option.
Raj drives slowly along the perimeter of a rectangular park at 24 kmph and completes one full round in 4 minutes 30 seconds. If the ratio of the length to the breadth of the park is 5 : 7, what are its dimensions?
A1500m x 700m
B375m x 525m
C35m x 49m
D100m x 100m
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So, length = 325m and breadth = 525m
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STEP-BY-STEP
Let the length be 5x then breadth will be 7x
Perimeter of rectangle is 2(l b) = 2(12x) = 24x
Speed in m/sec = 24*5/18 = 20/3m/sec.
Time Taken = 270sec
=> 24x = 20/3*270….. Hence x =75
Perimeter of rectangle is 2(l b) = 2(12x) = 24x
Speed in m/sec = 24*5/18 = 20/3m/sec.
Time Taken = 270sec
=> 24x = 20/3*270….. Hence x =75
So, length = 325m and breadth = 525m
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