Question

Three persons X, Y and Z can walk at the speed of 3
km/hr, 4 km/hr and 5 km/hr respectively. They start
from same place at 1:00 PM, 2:00 PM and 3:00 PM
respectively in the same direction. When Y catches X,
Y sends him back with a message for Z. If X delivers
the massage to Z at a : 6 PM, find the value of (a + b).​

Answer 1

Step-by-step explanation:

Let the speed of A is x km/hr and speed of B is y km/hr

Let them meet after t hours Then xT+yT= Total distance

After the meeting distance left for A=yT and the distance left for B=xT Now yT=4x and xT=9y

∴

xT

yT

=

9y

4x

⇒

y

2

x

2

=

4

9

⇒

y

x

=

2

3

⇒x:y=3:2..................

Hope this will help you..... xd