Question

a boy brings sweets from a shop moving along a straight line the shop is 120 m away from his house he takes 1 minute in going to the shop and one minute in coming back find the average speed and average velocity of the boy​

Answer 1

Explanation:

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Answer 2

Explanation:

Let the distance between the school and the house is x km

• Speed of the boy from house to school =20 km/hr.

Using formula, Time taken = distance/speed

.

• So, time taken = x/20hours.

Also,Speed of the boy from school to the house =30 km/hr

• So, time taken = x/30 hours.
• Total time taken = x/20+ x/30
• = x/12hours
• Also total distance covered by boy =x+x=2x km.
• Using formula,
• Average speed = Totaldistance/Total time
• = x/12×x/2
• =24 km/hr.

Thus, average speed of the boy's journey is 24 km/hr.