Multiple choice

Shital covers a certain distance in 9 hours at a speed of 40 km/h. If she wants to cover the same distance in 6 hours, by how much must she increase her speed (in km/h)?

  1. 12

  2. 15

  3. 20

  4. 25
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Distance = 9 * 40 = 360 km. New speed = 360 / 6 = 60 km/h. Increase = 60 - 40 = 20 km/h.

AI explanation

Using the distance formula, the total distance Shital covers is 40 km/h multiplied by 9 hours, which equals 360 km. To cover this 360 km distance in 6 hours, her required new speed is 360 divided by 6, resulting in 60 km/h. She must increase her speed by 60 minus 40, which equals 20 km/h.

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