A and B started their journeys from X to Y and Y to X, respectively. After crossing each other, A and B completed the remaining parts of their journeys in hours and 8 hours, respectively. If the speed of A is 32 km/h, then the speed in km/h of B is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 28
Given:
T1= 49 / 8 hour
T2 = 8 hour.
and S1 = 32 km/ hour.
Concept Used:
S1/S2 = √T2/T1 .....(i)
Explanation:
Using equation (i), we get
32/S2 = √(8 x 8/49) = √64/49
⇒ 32/S2 = 8/7
⇒ S2 = 28 km/h
Hence the speed of B is 28 km/h.