Fill in the blanks to make the statements true:
An auto rickshaw takes 3 hours to cover a distance of 36 km. If its speed is increased by 4 km/h., the time taken by it cover the same distance is …………...
An auto rickshaw takes 3h to cover a distance of 36km.
Then, its speed = 
km/h
If its speed increases 4km/h, then
New speed = 12 + 4 = 16km/h
Now, time taken by auto rickshaw to cover 36km in 
= 
= 2h 15 min
35