Question

a car travels first 100 km in 2.5 hours and next 30km in 1/2 hour.what is average speed?

Answer 1

total distance=130km

Total time= 3 hrs

Av.speed=130/3 km/hr

Answer 2

Given,

At first, The car travels   100 km in 2.5 hours and then 30km in $\frac{1}{2}$ hour.

To Find,

The average speed of the car.

Solution,

The car traveled at first 100 km and then a total of 30km.

So total distance the car traveled is (100+30)=130 Kms,

The car traveled a total of (2.5+0.5)=3 hours.

Hence the average speed = $\frac{Total Distance}{TotalTime}$=$\frac{130}{3}$ =43.33 km / hour.

Hence, The average speed of the car is 43.33 km/hour.