After covering a distance of 30km with a uniform speed there is some d

After covering a distance of 30km with a uniform speed there is some defect in a train engine and therefore ,it's speed is reduced to 4/5 of its original speed consequently, the train reaches its destination late by45 min ,had it happened after covering 18km more ,the train would have reached 9min earlier .find the speed of the train and distance of the journey

Nadir Siyavudeen

Feb. 25, 2018, 4:02 p.m.

Class 6