Question

A car covers first half of the distance between two place with a speed of 80km/hr and second half at 60km/hr then find the average speed​

Answer 1

Answer:

A car covers the first half the distance between two places at 40 km/h another half at 60 km/h, the average speed .

Answer 2

Answer:

The average speed of car= 48 km/h

Explanation:

Let's consider, x= total distance covered by the car,

Time taken to complete the half distance with velocity v=40km/h,

t1=(x)/(2*40)=x/80 hours ..........(1)

The time taken to complete another half distance with velocity u=60km/h

t2=(x)/(2*60)=x/120 hours ..........(2)

From Eq(1) & (2),

The total time taken, t=t1+t2=(x/80)+(x/120)

=(3x+2x)/240=5x/240

=x/48 hours

Therefore,

The average speed of the car=(x)/(x/48)

= 48 km/h