Question

An object travels a distance of 40km with avg speed of 80km/h and then next 40km with avg speed of 40km/h. Find the avg speed with the total distance​

Answer 1

Explanation:

The general method of finding average speed (not velocity) is just divide total distance travelled by total time taken.

Mathematically,

Av. Speed = (total distance travelled÷total time taken)

Now coming to this question,

Time taken in first 40km=(40÷80) =1/2 hour

Time taken to travel next 40km=(40÷40) =1 hour

Now total time taken to travel 80km= 1/2+1 = 1.5hours,

According to formula mentioned above,

Av. Speed = 80/1.5 = 53.33km/h.

Hope that it is clear

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Answer 2

ANSWER:

53.33km/h

EXPLANATION:

finding average speed

Av. Speed = (total distance travelled ÷ total time taken)

According to question

Time taken in first 40km=(40÷80) =1/2 hour

Time taken to travel next 40km=(40÷40) =1 hour

Now total time taken to travel 80km= 1/2+1 = 1.5hours,

According to formula mentioned above,

Av. Speed = 80/1.5 = 53.33km/h.