UPTET Paper 1 2013 Solved Paper

Concept:Speed conversion from m/s to km/h uses the fact that 1 km = 1000 m and 1 hour = 3600 seconds. Multiply speed in m/s by $\frac{3600}{1000}$ (or 3.6) to get km/h.Explanation:We are converting 10 m/s to km/h. First, convert meters to kilometers: 1 m = $\frac{1}{1000}$ km. So, 10 m = $\frac{10}{1000}$ km. Next, convert seconds to hours: 1 second = $\frac{1}{3600}$ hour. Therefore, 1 m/s means $\frac{1/1000}{1/3600}$ km/h = $\frac{3600}{1000}$ km/h = 3.6 km/h. For 10 m/s, multiply 10 by 3.6. Calculation: $10 \times 3.6 = 36$ km/h. Alternatively, use the direct formula: speed in km/h = speed in m/s × $\frac{18}{5}$, because $\frac{3600}{1000} = \frac{18}{5}$. So, 10 × $\frac{18}{5}$ = 36 km/h.Answer:36 km/h (Option D).