A beat B in a 100 m race. A covers the distance in 36 seconds and B in 45 seconds. In this race, A beats B by:

🧠 Explanation:

In a 100 m race, A finishes in 36 seconds, B in 45 seconds, so A beats B by 20 m. Calculate B’s distance in 36 seconds: (100 ÷ 45) × 36 = 80 m. So, 100 - 80 = 20 m. This helps students learn race calculations and ratios.