Multiple choice

Raju cycles from home to school, a distance of 6 km usually in 15 minutes. If today he took 3 minutes less than his usual time, what is the change in his speed?

  1. Increased by 6 Km/hr

  2. Decreased by 6 Km/hr

  3. Increased by 2 Km/hr

  4. It remains the same

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Usual speed = 6 km / (15/60) hr = 24 km/hr. New time = 15 - 3 = 12 minutes = 0.2 hours. New speed = 6 km / 0.2 hr = 30 km/hr. Change = 30 - 24 = 6 km/hr increase.

AI explanation

First, find the usual speed by dividing 6 km by 15 minutes (which is 0.25 hours), resulting in 24 km/hr. The new time is 12 minutes, or 0.2 hours, making the new speed 6 km divided by 0.2 hours, which equals 30 km/hr. The change in speed is an increase of 6 km/hr.