If Abhi travels a certain distance at 6 km/h. he reaches his destination 12 minutes early, but if he travels at 4 km/h, he reaches his destination 10 minutes late. The speed (in km/h) at which he should travel to reach his destination on time is _____.
Answer & explanation
Correct answer: option 4
Let right time to Abhi to cover its journey = t min
Distance = Speed × Time
According to question ,
\(\frac{6 × (t-12)}{60}\) = \(\frac{4 × (x+10)}{60}\)
3(t - 12) = 2 ( t + 10)
t = 56 minutes
Speed of Abhi = \(\frac{6 × (56-12)}{56}\) = \(\frac{6 × 44}{56}\)
= 4\(\frac{5}{7}\) km/h