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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?
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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