Question

A car travels a distance of 2000m if the first half distance is covered at 40 km per hour and the second half at velocity v and if the average velocity is 48 kilometre per hour and then the value of v

Answer 1

Time to cover first half = 1/40 hrs
Time to cover the second half = 1/v hrs
Average speed = 
total distance / total time = 1/1/40+1/v= 48 given
From the above equation v = 60 km/hr

Answer 2

Explanation:

car travels a distance of 2000m. If the first half distance is covered at 40 km/hour and the second half 2. at velocity v and if the average velocity is 48 km/hour then the value of v is (1) 56 km/hour (2) 60 km/hour (3) 50 km/hour (4) 48 km/hour.