Question

Question 105

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 kilometres per hour. To cover a distance of 200 km, how many miles Kusum would have to go?

Answer 1

50 miles per hour is same as travelling 80 km per hour
So, 1 km covers distance in 1 h to $\frac{50}{80}$ miles
To cover a distance of 200 km $=\frac{50}{80}\times 200=\frac{5\times 200}{8}=125$ miles
Hence 125 miles kusum has to go for 200 km.