NCO Cyber Olympiad Class 7: Questions 1 of 416
» Mental Ability » Basic Statistics
MCQ▾
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 

Answer
d.
Explanation

A certain distance is covered at a certain speed in time

Then

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

New speed .

Now, from (I), s2 =

So,


So, the ratio is 4: 1.