**Problem 1:** In a flight of 600 km, an aircraft slowed down due to bad weather. Its average speed for the trip was reduced by 200km/hr and the time of flight increased by 30 minutes. The duration of the flight is?

Solution:

Let speed of flight is x

Time=

x=600

**Problem 2:** A goods train leaves a station at a certain time and at a fixed speed. After 6 hours, an express train leaves the same station and moves in the same direction at a uniform speed of 90kmph. This train catches up the goods train in 4 hours. Find the speed of the goods train?

Solution:

Distance=Speed*Time

6*x +x*4=10x

10x=90*4

x=36

**Problem 3:** A monkey tries to ascend a greased pole 14m high. He ascends 2meters in the first minute and slips down one meter in the second minute. If he continues to ascend in this fashion how long does he takes to reach the tom?

Solution:

2 minutes———->1 meter

12*2 minutes——->1 meter *12

24 minutes———->12 meter

1 minute————>2 meter

25 minutes ——->14 meter

In 25 minutes the monkey reached 14 meters tomb.