Question

A train travels for 30 minutes with a velocity of 36km/h and then for 40 minutes with a velocity of 54km/h in same direction. Find the average velocity of train for entire journey

Answer 1

Answer:

Step-by-step explanation:

First we will calculate the distance of first 30 min then for next 40 min and then find the average.

Velocity= distance/ time.

Distance in first 30 minutes is 36*1/2= 18 km

Distance in next 40 minutes is 54*2/3= 36 km

Now we will find the final distance traveled which comes out to be 18+36=54 km

Now total time taken is 7/6 hr

Average velocity is 54/(7/6) = 46.285 km/hr.

Hence we first calculate the total distance traveled then total time taken. Then we get out velocity.

Answer 2

Answer:

46.285 km/hr.

Step-by-step explanation:

First we will calculate the distance of first 30 min then for next 40 min and then find the average.

Velocity= distance/ time.

Distance in first 30 minutes is 36*1/2= 18 km

Distance in next 40 minutes is 54*2/3= 36 km

Now we will find the final distance traveled which comes out to be 18+36=54 km

Now total time taken is 7/6 hr

Average velocity is 54/(7/6) = 46.285 km/hr.

Hence we first calculate the total distance traveled then total time taken. Then we get out velocity.