Question

A car covers first 50 km at a uniform velocity of 45 km/h and the

next 50 km at 90 km/h. Find the average velocity of the car​

Answer 1

Answer:

60 km /h

Step-by-step explanation:

d1 = 50 km , v1= 45 km/h, t1 = d1/ v1 = 50/45

t1 = 10/9 h

d2 = 50 km ,v1= 90 km/h, t2 = d2/v2 = 50/90

t2 = 5/9 h

v avg = total distance/ total time taken

= d1 + d2 / t1+ t2

= 100 / ( 10/9 + 5/9 )

= 100 / ( 15/9)

= 60 km / h