⇒ A and B walk around the circular track
⇒ A and B starts to walk around the circular park but in opposite direction
= 9 a. m
⇒ A and B walk in the speed = 2 rounds/ hr and 3 rounds / hr
TO FIND ;-
⇒How many times shall they cross each other before 9.30 a.m.?
⇒ Let us find their respective speed. -
Respective speed = Total speed of A + Total speed of B
= 2 + 3 = 5
So respective speed or relative speed is equal to 5 rounds \ hr.
⇒ So by this statement we derive that A and B cross 5 times.
Hence we can say that A And B cross 5 times in only 1 hr.
A and B cross 2 times in 1 \ 2 hrs
Time lapse between 8 a.m and 9.30 a.m is 1.5 hrs.
No. of times did A and B cross in 1 hr + No. of times did A and B cross in 1 \2 hrs =
⇒ 5 + 2 = 7 hrs
⇒Answer ;- Hence A and B cross 7 times