Question

a car travel a certain distance with a speed of 40 m/ second and return witha speed u . if the average speed for the whole journey is 48 m/ second , what is the value of u ?​

Answer 1

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Answer:

56m/s

Explanation:

A car travels a certain distance with a speed = 40m/s

returns with a speed "u" .

If the average speed for whole journey = 48m/s .

(40+u)/2=48

u= 96-40=

56m/s

Answer 2

Answer:

56m/s

Explanation:

• A car travels at certain distance with a speed=40m/s.
• Returns with a speed "u".
• If the average speed for whole journey=48m/s.
• (40+4)/2=48
• 4=96-40
• =56m/s

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