Let the times taken for the stretches be x,2x,3x hrs.

The respective speeds are 20,30,40 kmph.

Distance covered in every stretch stretch = Time taken in that stretch * Speed in that stretch

Thus respective distances are x*20 , 2x*30 , 3x*40 kms respectively.

Total distance being 100km,

x*20 + 2x*30 + 3x*40 =100

=>200x =100

=>x= 1/2

Thus total time= x+2x+3x=6x

= 6*(1/2) =3hrs (OPTION D)

## I travel for three stretches of time, in the ratio 1 : 2 : 3, at speeds of 20 kmph, 30 kmph and 40 kmph. If cover a total distance of 100 km, find the total time for which I am travelling. 1. 1 hour 2. 1.5 hours 3. 2 hours 4. 3 hours 5. 6 Print

Modified on: Tue, 12 Oct, 2021 at 12:13 PM

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