A) Kiran's speed is greater than Sharan's.
B) Sharan's speed is greater than Kiran's.
C) Sharan travels with a speed of \[75\,m\,{{\min }^{-1}}\]
D) Kiran travels with a speed of \[100\,m\,{{\min }^{-1}}\]
Correct Answer: B
Solution :
Assume that both took 20 minutes to reach the school. \[\text{Speed}\,\text{of}\,\text{Kiran}\,\text{=}\,\frac{\text{Distance}\,\text{travelled}}{\text{Time}\,\text{taken}}\,\text{=}\,\frac{\text{1500}}{\text{20}}\] \[\text{=75}\,\text{m}\,\text{mi}{{\text{n}}^{-1}}\] \[\text{Sharan}\,\text{=}\,\frac{\text{2000}}{\text{20}}\,\text{=}\,\text{100}\,\text{m}\,\text{mi}{{\text{n}}^{-1}}\] Sharan walks \[\text{100}\,\text{m}\,\text{mi}{{\text{n}}^{-1}}\] while Kiran walks \[\text{75}\,\text{m}\,\text{mi}{{\text{n}}^{-1}}.\] Thus, Sharan walks faster than Kiran.
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