A motorcyclist completes a certain journey in 5 hours. He covers one-third distance at 60 km/hour and the rest 80 km/hour. The length of the journey is-
Solution
Correct Answer: Option D
Let the length of the journey be x km.
Now,
{(x/3)/60} + {(2x/3)/80} = 5
⇒ (x/180) + (x/120) = 5
⇒ (2x + 3x)/360 = 5
⇒ 5x/360 = 5
⇒ x/360 = 1
⇒ x = 360
Now,
{(x/3)/60} + {(2x/3)/80} = 5
⇒ (x/180) + (x/120) = 5
⇒ (2x + 3x)/360 = 5
⇒ 5x/360 = 5
⇒ x/360 = 1
⇒ x = 360
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions