NCO- Cyber Olympiad (SOF) Class 7: Questions 1 of 422
Question MCQ▾
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. | 4: 1 | |
b. | 2: 1 | |
c. | 1: 2 | |
d. | 1: 4 |
Answer
a.
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.
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