Question

the distance between two cities is 120 kilometre the car covers the First 70 kilometre at a speed of 70 kilometre per hour and the remaining distance at 50 kilometre per hour . how much time did the car take Tu cover the distance​

Answer 1

Answer:

2 hours

Step-by-step explanation:

If the car covers the first distance in 70 kmph and the rest at 50 Kmph then the sum total is 120 km only!

Answer 2

Let n be 1/2 the distance between the two places. Then:

Total time:n/40 +n/60

Total distance: n+n=2n

Then, the average would be:

2n /n/40 + n/60=240n/ 3n + 2n

=240/5

=48 km/h avg