Question

the speed of a car for a trip is 20km/hr. on returrn trip along the same route it is 30 km/hr. what is the average speed of a car

Answer 1

Here we can imply the fomula
Average Speed=1st Speed+2nd Speed/2

So,by implying values we get
⇒20+30
    2
⇒50
    2
⇒25 km/hr

Answer 2

S1 + S2 / 2
20+30 / 2
50/2
25 km/hr.                     -      Average Speed.               Answer,........................