If a person goes from home to his college at a speed of 12 km/h, he reaches 7 minutes early. If he goes at a speed of 8 km/h, he reaches 14 minutes late. What is the distance between his home and his college?
Answer & explanation
Correct answer: option 3
Let distance = X km
Time difference = 14 - (-7) = 21 minutes
According to question ,
\(\frac{X}{8}\) - \(\frac{X}{12}\)= \(\frac{21}{60}\)
\(\frac{X}{24}\) = \(\frac{21}{60}\)
X = 8.4 km
So , Distance is 8.4 km