A train running at a speed of 80 km/hr can
cover a certain distance in 45 minutes. How
long will it take to cover the same distance if
its speed is increased by 10 km/hr?
Answers
Answer:
First, we will find the distance traveled by the train in 45 minutes at 80 km/h.
We know, Distance = Speed × Time.
Speed = 80 km/h.
Time = 45 min = 45/60 hr = 3/4 hours.
So, by using the formula, we get,
Distance = 80 * (3/4) = 20*3 = 60 km/h.
In the second part of the question it is told that how much time will it take to cover the same distance, with speed increase by 10 km/h.
Therefore, new speed = 80+10 = 90 km/h. And distance is again 60 km.
Therefore, Time = Distance ÷ Speed. By putting the values in the above formula, we get,
Time = 60 km ÷ 90 km/h.
Time = (2/3) hours. = (2/3)*60 = 40 min.
Therefore, the train will take exactly 40 minutes to cover the distance at 90 km/h.
Step-by-step explanation:
we know, distance = speed ×time
speed = 80 km /h Time = 45 min = 45/60 hr = 3/4 hours.
So, by using the formula, we get,
Distance = 80 * (3/4) = 20*3 = 60 km/h.
In the second part of the question it is told that how much time will it take to cover the same distance, with speed increase by 10 km/h.
Therefore, new speed = 80+10 = 90 km/h. And distance is again 60 km.
Therefore, Time = Distance ÷ Speed. By putting the values in the above formula, we get,
Time = 60 km ÷ 90 km/h.
Time = (2/3) hours. = (2/3)*60 = 40 min.
Therefore, the train will take exactly 40 minutes to cover the distance at 90 km/h.
Hope you got your answer. Thanks a lot..