Time & Distance
A bus cover a distance of 330 km in certain time at certain speed. When driver increased its speed by 20% then bus take 1 hour less time to cover previous distance. What will be difference between previous speed and new speed?
|E||None of these|
Let previous speed = x
After increasing 10% in speed, New speed be = x + x ×20% =1.2x
Difference = (1.2x – x) = 0.2x = 0.2 ×55 = 11 km