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Question
If a bus covers 195 km in 3 hours and a train covers 300 km in 4 hours, then the ratio of their speeds is
Options
13 : 15
15 : 13
13 : 12
12 : 13
Solution
13 : 15
`"Speed" = "Distance"/"Time"`
Speed of the bus = `(195 "km")/(3 "hr")` = 65 km/hr
Speed of the train = `"300 km"/"4 hr"` = 75 km/hr
Ratio = `65/75=(65 ÷ 5)/(75 ÷ 5) = 13/15` = 13:15
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