Question

Ravi running speed is 5.4 km per hour her daughter Sangeeta can run at 7.2 km per hour if they both start running from the house to the park sangeeta reaches 24 seconds earlier how far is the Park from the house​

Answer 1

Step-by-step explanation:

Let the distance from their house to the park be d metres.

Speed of Ravi = 5.4 km/ph = (5.4)(5/18) = 1.5 m/s

Speed of Sangeeta = 7.2 km/ph = (7.2)(5/18) = 2 m/s.

Time taken by Ravi to cover the distance = (d/s) = (d/1.5) seconds.

Time taken by Sangeeta to cover the same distance = (d/s) = (d/2) seconds.

Given d/1.5 = d/2 + 24

=> 4d = 3d + 144 by multiplying by 6

=> d=144

So, the distance from their house to the park be 144 metres.

HOPE ITS HELPFUL...