Question

Ram travels at a speed of 20 km/hr while going to school. While coming back, he travels at a speed of 30 km/hr(due to less traffic). What is his average speed?
(1 Point)
25km/hr
26km/hr
20km/hr
24km/hr​

Answer 1

Answer:

25 is the right answer bro

Answer 2

Concept:

The speed of an object is the magnitude of the change of its position over time or speed can be defined as the rate of change of position of an object in any direction.

Given:

The speed while going to school is $20km/h$.

The speed when he travels back is $30km/h$.

Find:

The average speed by which Ram travels his whole journey.

Solution:

Let $x$ be the distance traveled by Ram while going to school.

The speed while going to school, $V_1=20km/h$.

Now, speed is the distance by time. So, $V_1=\frac{x}{20}$ .

The speed while traveling back, $V_2=30km/h$.

The total distance traveled by Ram is $2x$.

Now,

Average speed is the total distance traveled in a particular time interval.

So, $V_{avg}=\frac{2x}{\frac{x}{30} +\frac{x}{20} }$

$V_{avg}=\frac{120x}{5x}$

$V_{avg}=24km/h$

The average speed of Ram during his whole journey is $24km/h$.

#SPJ3