Book Maths Puzzle

If a car increases its speed by 10 km/h than it takes 36 minutes less to cover a distance of 72 km. find the original speed of the car.

Read Solution (Total 1)

let original speed is 's';
so ,(72/s-72/(s+10))=36/60
on soliving..
s(s+10)=1200
i.e s=30 kmph
11 years agoHelpfull: Yes(3) No(0)

Book Other Question

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