1.

50 pointsA takes 3 hrs more than B to walk a distance of 30 km. but if A doubles his speed he is ahead of B by 1.5 hrs . Find the speed of A and B​​

Answer»

Step-by-step explanation:

Speed Is INVERSELY related to time : More time less speed ,Less speed more time"

D= 30 km :

X = LET x b time taken by B

Speed of B = 30 /x ;

speed of A : 30/[x+3]  { A take 3 HOURS More}

A:B = x/{x+3}  ----------- Eq 1

Also A doubled its  

Then  Speed A = 30/x-1.5  ,

B is same

2A:B = x/[x-1.5] -- eq 2

Solving For x  Eq1 & 2  

We get x=6 --->>

B = 5kmph ,

A=10/3

Follow me


Discussion

No Comment Found

Related InterviewSolutions