   # The ratio between the speeds of two trains is 7 : 8. If the second...........then what is the speed of the first train ?

155 views

The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then what is the speed of the first train ? posted Jan 8, 2016

Second train speed =s2=400km per 4 hour =100kmph
1st train speed=x
Ratio of speeds=7:8
Then
7:8::x/100
X=87.5kmph
Ans is 87.5kmph answer Jan 8, 2016

Similar Puzzles
+1 vote

A car M starts from point A and a car N starts from point B and move towards opposite sides at a constant speed. The cars meet 500 yards from A for the first time. After reaching the opposite points, each of the car returns back without any break and this time, they meet 300 yards from B.

What is the distance between the two points A and B and what is the relation between the speeds of the two boats? +1 vote

A train overtakes two persons walking along a railway track. The first one walks at 4.5 km/hr. The other one walks at 5.4 km/hr. The train needs 8.4 and 8.5 seconds respectively to overtake them.
What is the speed of the train if both the persons are walking in the same direction as the train?