Races - Quant/Math - CAT 2009
Question 4 the day:
July 12, 2002
The question for the day is the from the topic - Races.
- In a kilometre race, A can give B a start of 100 m or 15 seconds. How long does A take to complete the race?
| (1) |
150 seconds |
|
(2) |
165 seconds |
|
(3) |
135 seconds |
|
(4) |
66.67 seconds |
Correct Answer - (3)
Solution:
In a 1000 metre race A gives B a start of 100 m or 15 seconds.
This essentially means that B takes 15 seconds to run 100 m.
Therefore, B will take 150 seconds to run the stretch of 1000 metres. (1000 m = 10 times 100 m and therefore the time taken will also be 10 times 15 seconds = 150 seconds).
As A takes 15 seconds less than B, he will take 135 seconds to run the 1000 m.
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