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प्रश्न
Convert 20 m/s into km/hr.
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उत्तर १
20m/s can be converted into km/hr as
20 m/s = `(20 xx 3600)/1000` = 72 km/hr.
उत्तर २
`(1"m")/(1"s") = (10^(-3) "km")/(1/3600 "hr")`
= `(1/(1000))/(1/(3600)) "km"/"hr"`
= `(3600)/(1000)`
= 3.6 km/hr
1 m/s = 3.6 km/hr
20 m/s = 20 × 3.6 km/hr
= 72.0 km/hr
= 72 km/hr
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