Question

car travels 10 m with a speed 5m/sec and 20 m of distance with a speed 10 m/sec.the average speed is​

Answer 1

Answer:

We know that average speed = $\frac{Total Distance}{Total .Time}$

Now here Speed and Distance is given and we need time.

SO we know that $v =\frac{s}{t}$   => $t = \frac{s}{v}$

Now time in first case = 10/5 = 2 sec

In second case = 20/10 = 2 sec

Thus average speed = $\frac{10+20}{2+2}$ = $\frac{30}{4}$ = 7.5 m/s