A man rides at the rate of 18 km/hr, but stops for 6 mins. to change horses at the end of every 7th km. The time that he will take to cover a distance of 90 km is ?->(Show Answer!)

1. A man rides at the rate of 18 km/hr, but stops for 6 mins. to change horses at the end of every 7th km. The time that he will take to cover a distance of 90 km is

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By: anil on 05 May 2019 01.55 am

Speed of man = 18 km/h Total distance = 90 km As he stops after 7th km, => $$90=(12 imes7)+6$$ => He stops 12 times in the journey. Total stoppage time = $$12 imes6=72$$ min Real time = $$frac{90}{18}=5$$ hours $$ herefore$$ Required time taken = 5hr + 72 min = 6 hrs 12 min => Ans - (B)

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