Without any stoppages a person travels a certain distance at an average speed of 40 km/hr and with stoppages he covers the same distance at an average of 20 km/hr. How many minutes per hour does he stop?a)15 minutesb)20 minutesc)30 minutesd)45 minutese)None of theseCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km
so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30
minutes

Answer

In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km
so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30
minutes

Answer

In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km
so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30
minutes

Answer

In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km
so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30
minutes

Answer

In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km
so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30
minutes

Answer

In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km
so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30
minutes

Answer

In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km
so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30
minutes

Answer

In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km
so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30
minutes

Answer

To solve this problem, let's assume that the distance covered is D km.

Average speed = Total distance / Total time

Without stoppages:
Average speed = 40 km/hr
Total distance = D km
Total time = D / 40

With stoppages:
Average speed = 20 km/hr
Total distance = D km
Total time = D / 20

We need to find the time spent in stoppages, which is the difference between the total time with stoppages and the total time without stoppages.

Time spent in stoppages = Total time without stoppages - Total time with stoppages

Time spent in stoppages = (D / 40) - (D / 20)

Simplifying the equation:
Time spent in stoppages = D / 40 - D / 20
Time spent in stoppages = (2D - D) / 40
Time spent in stoppages = D / 40

Since we want to find the time spent in stoppages per hour, we need to convert the time spent in stoppages to minutes per hour.

Time spent in stoppages per hour = (D / 40) * 60

Simplifying the equation:
Time spent in stoppages per hour = D * (60 / 40)
Time spent in stoppages per hour = D * (3 / 2)

Therefore, the person stops for D * (3 / 2) minutes per hour.

Since we don't have a specific value for D in the question, we can conclude that the person stops for 30 minutes per hour on average, regardless of the distance covered.

Thus, the correct answer is option C) 30 minutes.

Answer

In one hour the distance covered at actual speed = 40km and with stoppages it covers only 20 km
so to travel 20 km at original speed i.e. 20 = 40*t, so t = 1/2 hour = 30
minutes

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