Multiple choice

How many seconds does Mr. Surya take to cover a distance of 500 m if he runs at a speed of 25 km/hr?

  1. 35 sec

  2. 80 sec

  3. 72 sec

  4. 60 sec
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Speed = 25 km/hr = 25 * 5/18 m/s = 125/18 m/s. Time = Distance / Speed = 500 / (125/18) = 500 * 18 / 125 = 4 * 18 = 72 seconds.

AI explanation

Using the unit conversion, 25 km per hour is equal to 25 multiplied by 5 divided by 18, which gives a speed of 125 divided by 18 meters per second. The time taken is calculated using the formula time equals distance divided by speed, becoming 500 divided by (125 divided by 18). This simplifies to 500 multiplied by 18 divided by 125, resulting in 72 seconds.

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