Question

Swami walks to his school which is at a distance of 4 km from his home in 30 minutes. On reaching he finds that the school is closed and comes back in his friend’s vehicle to home in 10 minutes. His average speed in km/h will be?

Answer 1

SOLUTION

GIVEN

• Swami walks to his school which is at a distance of 4 km from his home in 30 minutes.

• On reaching he finds that the school is closed and comes back in his friend’s vehicle to home in 10 minutes.

TO DETERMINE l

The average speed of Swami in km/h

EVALUATION

Here it is given that Swami walks to his school which is at a distance of 4 km from his home in 30 minutes.

On reaching he finds that the school is closed and comes back in his friend’s vehicle to home in 10 minutes.

Total distance travelled

= 4 km + 4 km

= 8 km

Total time taken

= 30 + 10 minutes

= 40 minutes

= 40/60 hour

= 2/3 hour

Hence the required average speed of Swami

$\sf \: = \dfrac{8}{ \frac{2}{3} } \: \: km/h$

$\sf \: = \dfrac{8 \times 3}{2 } \: \: km/h$

$\sf \: = 12 \: \: km/h$

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Answer 2

SOLUTION

GIVEN

Swami walks to his school which is at a distance of 4 km from his home in 30 minutes.

On reaching he finds that the school is closed and comes back in his friend’s vehicle to home in 10 minutes.

TO DETERMINE l

The average speed of Swami in km/h

EVALUATION

Here it is given that Swami walks to his school which is at a distance of 4 km from his home in 30 minutes.

On reaching he finds that the school is closed and comes back in his friend’s vehicle to home in 10 minutes.

Total distance travelled

= 4 km + 4 km

= 8 km

Total time taken

= 30 + 10 minutes

= 40 minutes

= 40/60 hour

= 2/3 hour

Hence the required average speed of Swami

\sf \: = \dfrac{8}{ \frac{2}{3} } \: \: km/h=328km/h

\sf \: = \dfrac{8 \times 3}{2 } \: \: km/h=28×3km/h

\sf \: = 12 \: \: km/h=12km/h

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Learn more from Brainly :-

1.1. The velocity-time (v-t) graph of a particle moving along a straight line is shown below. Find the average velocity of th...

https://brainly.in/question/42132746

2. find the speed of sound in air at 50 degree C and 70 dgree C (take speed of sound 332m/s)

https://brainly.in/question/40606714