Aptitude - Races and Games - Discussion
Discussion Forum : Races and Games - General Questions (Q.No. 11)
11.
In a 300 m race A beats B by 22.5 m or 6 seconds. B's time over the course is:
Answer: Option
Explanation:
| B runs | 45 | m in 6 sec. |
| 2 |
 B covers 300 m in |
 |
6 x | 2 | x 300 |  sec |
= 80 sec. |
| 45 |
Discussion:
22 comments Page 2 of 3.
Ramya said:
1 decade ago
80 sec is correct but its only for A to cover 300 m as it beats.
B by 6 sec time taken by B to cover whole 300 m is 80+6 = 86 sec.
B by 6 sec time taken by B to cover whole 300 m is 80+6 = 86 sec.
Debjani Nandy said:
10 years ago
A has already completed the race when B was 22.5 m behind. Moreover B has taken 6 s more than A to complete the race. So at the time A completes the race, B takes an addition of 6 secs to cover up the distance of 22.5 m by which he was behind. So he travels 22.5 m in the additional 6 sec which is nothing but 45/2 m.
Vyshu.. said:
9 years ago
Let's the solution is that:-.
6 * (1/22.5) * 300 = 80.
Therefore, 80 sec is the answer.
6 * (1/22.5) * 300 = 80.
Therefore, 80 sec is the answer.
Ravi Pudinawala said:
9 years ago
Very good explanation @Vyshu.
Dileeo said:
8 years ago
First of all, everyone having doubt of why 45/2 m/s speed is added to B why not A?
Answer is after race completion B takes that additional 6 sec to complete the race from given data we can find B speed and time
22.5 mts - 6 sec then 300 mts - 80sec it will take to complete 300 mts race here ' -' symbol is equal to.
Answer is after race completion B takes that additional 6 sec to complete the race from given data we can find B speed and time
22.5 mts - 6 sec then 300 mts - 80sec it will take to complete 300 mts race here ' -' symbol is equal to.
VENKATESHBABU said:
7 years ago
Using chain rule:
22.5 ---- 6
300 ---- ?
300/22.5*6 = 80.
If we want A 80-6 = 72.
22.5 ---- 6
300 ---- ?
300/22.5*6 = 80.
If we want A 80-6 = 72.
Gopi said:
7 years ago
I agree @Ramya.
80 sec for A to cover 300m since A beats B by 6 sec. 6 sec should add to 80 sec. Therefore 86 sec should be the answer.
80 sec for A to cover 300m since A beats B by 6 sec. 6 sec should add to 80 sec. Therefore 86 sec should be the answer.
(3)
Nimu said:
6 years ago
86 is the right answer.
(4)
Nancy said:
6 years ago
How 45/2 comes?
(2)
Tanmaya pradhan said:
6 years ago
22.5m = 6s.
1m = 6s÷22.5m = 60÷225 = 2÷45.
300m = (2÷45)x300 = 80s.
1m = 6s÷22.5m = 60÷225 = 2÷45.
300m = (2÷45)x300 = 80s.
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