Rahul and Mithun travel a distance of 30 km. The sum of their speeds…

Question

Rahul and Mithun travel a distance of 30 km. The sum of their speeds is 70 km/h and the total time taken by both to travel the distance is 2 hours 6 minutes. The difference between their speeds is:

Accepted Answer

Option A. 30 km/h. Answer & Solution Answer: Option A Solution: & x + y = 70 & 30x + 30y = 2110 & 30 [ x + yxy ] = 2110 & 30 × 70xy = 2110 & xy = 1000 & ( x - y )^2 = ( x + y )^2 - 4xy & ( x - y )^2 = 4900 - 4000 & ( x - y )^2 = 900 & ( x - y ) = 30\, km/hr