Question

after covering a distance of 30 km with a uniform speed there is a defect in engine and therefore its speed is reduced to 4/5 of its original speed. so train reaches its destination 9m earlier . find the uniform speed of train .
a)25km/h
b)30km/h
c)40km/h
d)35km/h
please answer
its urgent ​

Answer 1

Answer:

Answer is 120 km

Step-by-step explanation:

Train proceeds at 4/5 S where S is his usual speed means 1/5 decrease in speed which

Now the main difference comes in those extra 

18km  and the change in difference of time = (45-36) min = 9 min.

Thus,

1/4*T = 9 min where T is the time required to cover the distance of 18 km.

T = 36 min = 36 /60 hours = 0.6 hours.

Speed of the Train = 18/0.6 = 30 kmph.

Distance =4/5×150=120KM

I hope it helps you.....

Answer 2

Step-by-step explanation:

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