Question

Question # 36
Revi
Prateek traveled the first 2 hours of his journey at 50 kmph, and the remaining 3 hours of his journey at 90
kmph.What is his average speed for the entire journey?​

Answer 1

Answer:

answer is 28 kmph.

Step-by-step explanation:

average speed= total distance/total time

50+90/2+3=140/5=28

I hope it help you

Answer 2

Given,

The speed in the first two hours in kmph

The speed in the remaining three hours in kmph

 Solution,

Know that the distance covered is equal to the speed during the given distance multiplied by the time taken to complete it.

The distance covered in the first two hours

$\[\begin{array}{l} = 2 \times 50\\ = 100\end{array}\]$

The distance covered in the next three hours

$\[\begin{array}{l} = 3 \times 90\\ = 270\end{array}\]$

Therefore, the average speed is

$\[\begin{array}{l} = \frac{{100 + 270}}{{2 + 3}}\\ = \frac{{370}}{5}\\ = 74\end{array}\]$

Hence, the average speed is$\[74\]$  kmph.