Question

A train travels 180km at a uniform speed. if the speed has been 9km/h more,it would have taken 1 hour less for the same journey find the speed of train
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Answer 1

Answer:

ans will be 36 km/h

explanation

speed =distance/time

so

(180/x)- (180/x+9)=1

on solving

x^2+9x-1620=0

x= 36,-45

speed can not be neg...

so

x= 36km/h