In a 200 m walk race, Zakia walks at an average speed of 5 km/h. She gives a start of 20 m to Veena and still beats her by 18
seconds. What is the average speed of Veena (in km/h)?
This questions was previously asked in
SSC MTS 20th October 2021 Shift-1
Explanation:
- Zakia walks a total distance of 200 m.
- Her average speed is 5 km/h.
- Zakia gives a start of 20 m to Veena, so Veena walks only 180 m.
- Zakia still beats Veena by 18 seconds.
- We need to find Veena’s average speed in km/h.
Calculating Zakia's time to cover 200 m:
- Convert 5 km/h to m/s: \( \frac{5 \times 1000}{3600} \approx 1.39 \) m/s.
- Time taken by Zakia = \( \frac{200}{1.39} \approx 144.2 \) seconds.
Veena finishes 18 seconds later:
- Veena's time = 144.2 + 18 = 162.2 seconds for 180 m.
- Her speed in m/s = \( \frac{180}{162.2} \approx 1.11 \) m/s.
- Convert to km/h: \( 1.11 \times \frac{3600}{1000} \approx 4 \) km/h.
Option 3: 4 is the correct answer.
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By: santosh