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प्रश्न
A train is moving with a uniform speed of 120 km per hour.
(i) How far will it travel in 36 minutes?
(ii) In how much time will it cover 210 km?
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उत्तर
(i) Speed of train in 60 minutes = 120 km
i.e. distance covered in 60 minutes =`120/60`
Distance covered in 36 minutes =`(120xx36)/60`
= 2 × 36
= 72 km
(ii) If distance covered is 120 km then the time is taken = 60 minutes
If distance covered is 1 km then the time is taken =`60/120`
If the distance covered is 210 km then the time is taken =`60/120xx210` = 105 minutes
= 1 hours 45 minutes
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