Question

car
А A
travels half the distance with constant
velocity
50 km/h and
40 kmph along straight line, find the average velocity in kmph
​

Answer 1

Answer:

The answer will be 44.44 km/h.

Explanation:

Let the half distance be x.

Velocity for first half distance = 50 km/h ;

Velocity of car for another half distance = 40km/h;

Time taken to travel first half of distance;

        = Time = Distance/speed;

                     = x / 50 hours.

Time taken to travel second half of distance;

        = Time = Distance/speed;

                     = x / 40 hours.

Now, average velocity is given by;

                 = (Total Distance travelled) / (Total time taken);

                 =  (x + x) / {(x/50) + (x/40)};

                 = 2x / (9x/200);

                 = 2x * 200 / (9x);

                 = 400x / 9x;

                 = (400/9) km/h = 44.44 km/h.

That's all.