Question
A truck covers a distance of 550 metre in one minute where as a bus covers a distance of 33 km in $3/4$ hour. Then the ratio of their speeds is :
Answer: Option B
Answer: (b)Speed of truck= ${550\text"metre"}/{60\text"second"} = (55/6)$ m./sec.Speed of bus= ${33 × 1000 \text"metre"}/{3/4 × 60 × 60 \text"second"} = 440/36$ m./sec.∴ Required ratio = $55/6 : 440/36$= 55 × 6 : 440 = 3 : 4
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Answer: (b)Speed of truck= ${550\text"metre"}/{60\text"second"} = (55/6)$ m./sec.Speed of bus= ${33 × 1000 \text"metre"}/{3/4 × 60 × 60 \text"second"} = 440/36$ m./sec.∴ Required ratio = $55/6 : 440/36$= 55 × 6 : 440 = 3 : 4
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