Question

A car covers the first half of the distance between 2 places at speed of 40km/h and the second half with 60km/h what is its avg velocity

Answer 1

Hey.

Here is the answer.

let total distance be 2x km

1st half = x km ; speed = 40kmph

time taken = x/40 h

2nd half = x km ; speed = 60kmph

time= x/60 h

Total distance travelled= 2x km

total time taken= x/40 + x/60

= (3x+2x)/120

= 5x/120

= x/24 h

average speed= total distance travelled/total time taken

= 2x/ (x/24) = 48 kmph

Thanks.