Question

Two cycles start from a house with a speed of 24km/hr. At interval of 15 minutes. With how much more speed (km/hr.) the woman coming from the opposite direction towards the house has to travel to meet the cycles at an interval of 10 minutes?

Answer 1

Answer:

Woman need to travel at 12 km/hr

Explanation:

Two cycles start from a house with a speed of 24km/hr

At interval of 15 minutes

Distance covered by First cyclist in 15 minutes

15 minutes = 15/60 hr = 1/4 hr

Distance = Speed * Time

=-> Distance = 24 * (1/4) = 6 km

Now When Woman coming from opposite direction Meets first cyclist then she is 6 km away from second Cyclist

Now in 10 minutes Distance covred by second cyclist

= 24 * (10/60) = 4 km

Distance to be covered by woman in 10 min = 6 - 4 = 2 km

Time = 10 min = 1/6 hr

Speed of Woman = 2/(1/6)  = 12 km/hr

Woman need to travel at 12 km/hr