A train travels at a uniform speed of 360 km . If it’s speed is 4 km per hr mre it would have taken 48 mins left
Answers
Answered by
0
Let x be the speed of the train ,
Therefore time=distance/speed
=360/x
According to the question
360/x - 360/x+5 = 48
Taking 360 as common we get
360(1/x -1/×+5)= 48
Taking 360 to the RHS part
(1/x -1/x+5) = 48÷ 360
(1/x -1/x+5) = 6/45
Taking lcm in LHS
5/x^2 -5x =6/45
Apply cross multiplication
5(45)= 6(x^2-5x )
225= 6x^2 -30x
6x^2 -30x - 225 =0
Solve using quadratic formula or completing square
Final answer = 40km/hr
Similar questions