Question

A loaded moving truck is moving 20 mph faster than a freight train . In the time it takes the train to travel 160 miles , the truck travels 240 miles . Find the speed of the truck .

Answer 1

let speed of train be x

then speed of truck = 20mile per hour

now given in time t , if train travel 160miles mean while the truck travel 240miles

=>>160miles =x miles/hr ×t

&

=>>240 miles =(x+20)miles/hr×t

from above both equations 160/x=240/(x+20)

2/x=3/(x+20)

2(x+20)=3(x)

2x+40=3x

x=40miles per hour

so speed of truck =60 miles per hour

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