A train covered a certain distance at a uniform speed. If the train h…

Question

A train covered a certain distance at a uniform speed. If the train had been 6 km/hr faster, then it would have taken 4 hours less then the scheduled time. And, if the train were slower by 6 km/hr, then the train would…

Accepted Answer

Option B. 720 km. Answer & Solution Answer: Option B Solution: Let distance = x km and usual speed = y kmph & x/y - xy + 6 = 4 & 6x = 4y ( y + 6 ).....(i) And, & xy - 6 - x/y = 6 & 6x = 6y ( y - 6 ).....(ii) From (i) and (ii), we get : & 4y ( y + 6 ) = 6y ( y - 6 ) & 2 ( y + 6 ) = 3 ( y - 6 ) & y…

A train covered a certain distance at a uniform speed. If the train had been 6 km/hr faster, then it would have taken 4 hours less then the scheduled time. And, if the train were slower by 6 km/hr, then the train would have take 6 hours more than the scheduled time. The length of the journey is :

Solution