a bus travels at a rate 30kmph for 5 mins then 40kmph for 9 min and finally 50 kmph for 7 min find the total distance covered
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70 km mark me brainlist please
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Given info : a bus travels at a rate of 30 kmph for 5 min and then 40 kmph for 9 min and finally 50 kmph for 7 min.
To find : the total distance covered by the bus is ...
solution : we know, distance = speed × time
so, distance covered by bus in first case, s₁ = 30km/h × 5 min
= 30 × 5/18 m/s × 5 × 60 s
= 2500 m
distance covered by bus in 2nd case, s₂ = 40km/h × 9 min
= 40 × 5/18 m/s × 9 × 60 s
= 6000 m
distance covered by bus in 3rd case, s₃ = 50km/h × 7 min
= 50 × 5/18 m/s × 7 × 60 s
= 5833 m [approx]
therefore the total distance covered by bus = s₁ + s₂ + s₃
= 2500 m + 6000 m + 5833 m = 14333 m = 14.33 km
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