What will be the Ratio of the Two Speeds?

A certain distance is covered at a certain speed. If half of this distance is covered in double the time, the ratio of the two speeds is:

  1. 4:1
  2. 1:4
  3. 2:1
  4. 1:2
Monis Rasool Professor Asked on 21st May 2015 in Maths.
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1 Answer(s)

Answer: (1) 4:1
Let be certain distance is = d
Time taken = t
Then speed (S1) = distance travelled/time taken = d/t

Data given for second case,
New distance = half of original distance = d/2
Time taken during this journey = Double of original time = 2t
Then new speed (S2) = (d/2)/2t = d/4t

Thus,
the ratio of two speeds = S1 / S2 = (d/t) / (d/4t) = 4

Ratio of two speeds = 4 : 1

Anurag Mishra Professor Answered on 22nd May 2015.
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