Answer:
162 minutes
Explanation:
Parameters given:
Harriet's speed from town A to B = 115 km/hr
Harriet's speed from B to A = 135 km/hr
Total time taken = 5 hours
We know that the distance from A to B is constant and the same as the distance from B to A.
Distance given in terms of speed and time as:
Distance = speed * time.
Let the time taken to get from A to B be x hours. Hence, the time taken to get from B to A will be:
Time = (5 - x) hours
The distance between A and B will be:
D(A, B) = 115 * x
The distance between B and A will be:
D(B, A) = 135 * (5 - x)
Since D(A, B) = D(B, A),
=> 115 * x = 135 * (5 - x)
=> 115x = 675 - 135x
115x + 135x = 675
=> 250x = 675
x = 675/250 hours
x = 2.7 hours = 2.7 * 60 minutes
x = 162 mins
Therefore, it took 162 minutes for Harriet to get from town A to B.
