NCO- Cyber Olympiad Class 7: Questions 1 of 416

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Question

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

Choices

Choice (4) Response

a.

1: 4

b.

2: 1

c.

1: 2

d.

4: 1

Topic iScore

Ques. Time

Answer

d.

Explanation

  • A certain distance Equation is covered at a certain speed Equation in time Equation

  • Then Equation Equation

  • Now half of this distance is covered in triple in time, so distance Equation and time t2 = Equation

  • New speed Equation .

  • Now, from (I), s2 = Equation

  • So, Equation

  • Equation

  • So, the ratio is 4: 1.

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