Question

Dhruv travels with a speed of 40km/hr for the first two hours of his journey and then

travels at a speed of 60km/hr for the next two hours. Find the average speed for the entire

journey.
please explain the answer​

Answer 1

Answer:

Explanation:

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Answer 2

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Speed₁ = 40 km/h

Time₁ = 2 hrs

Distance = speed * time

= 40*2 = 80 km

______________________

Speed₂ = 60 km/h

Time₂ = 2 hours

Distance = speed * time

= 60*2 = 120 km

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• Total distance travelled by Dhruv = 120 km + 80 km

                                                          = 200 km

• Total time taken by Dhruv = 2hrs + 2 hrs

                                              = 4 hrs

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We know,

$\displaystyle{\textsf{The average speed of the journey =} \sf{ \frac{Total\ distance\ covered}{Total\ time\ taken} }}$

⇒ Average speed of the journey = 200/4

⇒ Average speed of the journey = 50 km/h

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Thank you ☺