a train travels 1200km in 8hrs40min.How long would it take to travel 420km
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Distance = 1200 Km
Time = 8hr 40min
= 8hr (40/60) hr
= 8+(4/6)
= 52/6
= 26/3 hr
Speed = Distance/Time
= 1200 ÷ (26/3)
= (1200×3)/26
= 3600/26
= 1800/13 km/hr
Now ;
Distance = 420 km
Speed = 1800/13
Time = Distance/Speed
= (430×13)/1800
= 559/180 hr
= 3hr (19/180)×60 min
= 3hr 19/3 min
= 3hr 6min 20 sec
-----------------------------------
Time = 8hr 40min
= 8hr (40/60) hr
= 8+(4/6)
= 52/6
= 26/3 hr
Speed = Distance/Time
= 1200 ÷ (26/3)
= (1200×3)/26
= 3600/26
= 1800/13 km/hr
Now ;
Distance = 420 km
Speed = 1800/13
Time = Distance/Speed
= (430×13)/1800
= 559/180 hr
= 3hr (19/180)×60 min
= 3hr 19/3 min
= 3hr 6min 20 sec
-----------------------------------
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