1)An escalator is descending at constant speed.
A walks down and takes 50 steps to reach the bottom.
B runs down and takes 90 steps in the same time as A takes 10
How many steps are visible when the escalator is not operating?
2)Every day a cyclist meets a train at a particular crossing.
The road is straight before the crossing and both are travelling in
the same direction.The cyclist travels with a speed of 10 Kmph.
One day the cyclist comes late by 25 min. and meets the train 5km
before the crossing. What is the speed of the train?