Problems Involving Ratio Of Speed


 
 
Concept Explanation
 

Problems Involving Ratio Of Speed

If the ratio of the speeds of two objects A and B is given in ratio as a:b. then the ratio of the time taken by them to cover the same distance is

frac{1}{a}:frac{1}{b};or;b:a

Proof: The ratio of speed is a:b

Let the common factor be m

Then speed of A = am

Speed of B  = bm

Let the distance traveled be x meter

We know that

.... (More Text Available, Login?)
Sample Questions
(More Questions for each concept available in Login)
Question : 1

The ratio between the speeds of two trains is 3:7, if the second train runs 40 kms in 6 hours, then the time taken by the first train to cover 40 kms is ________________ hours.

Right Option : C
View Explanation
Explanation
Question : 2

The ratio between the speeds of two trains is 4:7, if the second train runs 200 kms in 12 hours, then the time taken by the first train to cover 200 kms is ________________ hours.

Right Option : B
View Explanation
Explanation
Question : 3

The ratio between the speeds of two trains is 9:11, if the first train runs 200 kms in 22 hours, then the time taken by the second train to cover 200 kms is ________________ hours.

Right Option : C
View Explanation
Explanation
 
 
Related Videos
Language - English
Language - English
Language - English



Students / Parents Reviews [10]