Question

6. A car travels first 30 km with a uniform speed of
60 km h- and then next 30 km with a uniform speed
of 40 km h-'. Calculate : (i) the total time of journey,
(ii) the average speed of the car.​

Answer 1

Answer:

I)1.25hours

Ii)48km/h

Explanation:

Time t = distance/speed

t1=30/60=0.5hours

t2=30/40=0.75hours

Total time =0.5+0.75=1.25hours

=total distance/total time

=(30+30)/1.25

=60/1.25

=48km/h