Question

The average speed of a car that covers half the distance with a speed of 20 m/s and the other
half with a speed of 30 m/s in equal intervals of time is
(a) 25 m/s
(b) 0 m/s
(c) 24 m/s
(d) 2.4 m/s​

Answer 1

Answer:

average speed = 25m/s

Explanation:

average speed is calculated by = total no of speed/no.of speed=x+y/2

let x and y be different speed

average speed=20+30/2

average speed=25m/s

Answer 2

Explanation:

average speed= total distance/ 2

20+30/2=50/2

=25m/s

option B

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