A journey takes 6 hrs 30 mins at a speed of 60 km/h. How long will the same journey take at a speed of 15 m/sec ?
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Answer:given ,
speed = 60kmph = 50/3m/s
time = 4hr 30 min = 4×60+30min= 240+30=270min
time = 270×60 = 16200seconds
distance = speed × time
distance = 16200×50/3
distance = 5400×50m
distance = 270000m
distance = 270 km
given , new speed = 15 m/s
distance = 270000m
time = distance / speed
time = 270000/15
time = 90000/5
time = 18000s
new time = 18000s = 300 min = 5 hours
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