Time gap to infer the slower speed: In a 100 m race, Kamal defeats Bimal by 5 s. If Kamal’s speed is 18 km/h, what is Bimal’s speed (km/h)?

Introduction / Context:Given one runner's speed and the finish time difference, compute the slower runner's finish time and speed.

Given Data / Assumptions:

• Kamal speed = 18 km/h = 5 m/s.
• Race = 100 m. Kamal wins by 5 s, so Bimal takes 5 s longer.

Concept / Approach:First find Kamal's time; add 5 s for Bimal; then compute Bimal's speed = distance / time, convert to km/h.

Step-by-Step Solution:

Verification / Alternative check:Unit conversion: 4 m/s * 3.6 = 14.4 km/h.

Why Other Options Are Wrong:15.4/14.5/14 are rounding or setup errors; the exact is 14.4.

Common Pitfalls:Misconverting m/s ↔ km/h or misapplying the 5 s gap.

Final Answer:14.4 km/h