Arpit completes a journey in 10 hours. He covers half of the distance at 30 km/h, and the remaining half of the distance at 70 km/h. What is the length of the journey?

500 km 210 km 320 km 420 km

420 km

Let Total distance = @D km According to question  , \(\frac{D}{30}\) +  \(\frac{D}{70}\)  = 10 hours  \(\frac{100D}{2100}\) = 10 D = 210 km Total Distance = 2D = 2 × 210 = 420 km