There ia truck which should reach some place at 11`o clock , if it travels with 30 mph itreaches 1 hour before , if it travles with 20 mph it reaches 1 hour late. what is the distance it must be travlled and what is the speed it must maintain to rech at exact time?ans: 120 miles and 24 mph

Madhusmita_behera
Profile Answers by Madhusmita_behera Questions by Madhusmita_behera
Sep 24th, 2006
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sharma.mahesh3
Profile Answers by sharma.mahesh3

Nov 28th, 2007

let T is exact time has to be taken by truck
let X is distance travelled
so
      X=30(T-1)
      X=20(T+1)
     30(T-1)=20(T+1)

     T=5

      X=30(5-1)
       X=120miles

     speed=X/T;
                =120/5
                =24mph