Question

Kusum always forgets how to convert miles to kilometres and back again. However she remembers that her car's speedometer shows both miles and kilometres. She knows that travelling $50$ miles per hour is same as travelling $80$ kilometers per hour. To cover a distance of $200km$, how many miles Kusum would have to go?

Answer 1

$50$ miles/hour $=80km$/hour
$1km=\frac{50}{80}=\frac{5}{8}$ miles
To cover a distance of $200km=\frac{5}{8}\times 200=125$ miles