Anu drives her car for 1 hour at a speed of 60 km/h, for 2 hours at a speed of 55 km/h, and for 3 hours at a speed of 45 km/h. What is the speed of the car (in km/h)?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 50.
1 hour at 60 km/h → 60 × 1 = 60 km
2 hours at 55 km/h → 55 × 2 = 110 km
3 hours at 45 km/h → 45 × 3 = 135km
Total distance = 60 + 110 + 135 = 305 km
Total time = 1 + 2 + 3 = 6 hours
Average speed = 305/6 = 50 kmph