a bullet train can cover 550 km in 3 hours if the speed of trainis decreased by 23 1/3 km/hr. how much will it take to cover a distance of 480 km
Answers
The answer for this is
2 hrs
It will take 3 hours to cover a distance of 480 km.
Given : A bullet train can cover 550 km in 3 hours if the speed of train is decreased by 23 1/3 km/hr.
To find : The time that the train will take to cover a distance of 480 km.
Solution :
We can simply solve this mathematical problem by using the following mathematical process. (our goal is to calculate the time taken by the train to cover 480 km)
First of all, we have to calculate the initial speed of the train.
Initially,
The train covers in 3 hours = 550 km
The train covers in 1 hour = (550/3) km
Initial speed of the train = (550/3) km/h
Decreased speed :
= (550/3) - (23 ⅓)
= (550/3) - (70/3)
= (550-70)/3
= (480/3) km/h
Now,
The train can cover (480/3) km in = 1 hour
The train can cover 1 km in = 1 × (3/480) hours
The train can cover 480 km in = 480 × 1 × (3/480) = 3 hours
Hence, the train can cover 480 km in 3 hours.