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The Speeds Of A And B Are In The Ratio 3: 4. A Takes 20 Minutes More Than B To Reach A Destination. In What Time Does A Reach The Destination?let The Time Taken By A Be X Hours? |
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Answer» The time TAKEN by B =(X-20/60)hrs = (x-1/3)hrs Ratio of speeds = INVERSE ratio of time taken Therefore 3: 4 =(x-1/3) : x =>3x-1/3x=3/4 => 12X -4 =9x => 3x =4 => X=4/3 hrs. X=1 1/3 hours. Required time = 1 1/3 hrs. The time taken by B =(x-20/60)hrs = (x-1/3)hrs Ratio of speeds = Inverse ratio of time taken Therefore 3: 4 =(x-1/3) : x =>3x-1/3x=3/4 => 12x -4 =9x => 3x =4 => X=4/3 hrs. X=1 1/3 hours. Required time = 1 1/3 hrs. |
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