Correct Answer - Option 2 : 240 km
Given:
Arun travels for 7 hours.
The speed of the first hour is 40 km/hr and the rest hour is 30 km/hr
Formula used:
Time = Distance/Speed
Calculation:
Let the total distance travelled by Arun be '2D'
∴ \( {D \ \over 30} + {D \ \over 40} = 7\)
⇒ \( {4D + 3D \ \over 120} = 7\)
⇒ \( {7D \ \over 120} = 7\)
⇒ 7D = 840
⇒ D = 120 km
∴ Total distance = 2D = 240 km
∴ The total distance travelled by Arun is 240 km.
