Aptitude - Races and Games - Discussion
Discussion Forum : Races and Games - General Questions (Q.No. 7)
7.
In 100 m race, A covers the distance in 36 seconds and B in 45 seconds. In this race A beats B by:
Answer: Option
Explanation:
| Distance covered by B in 9 sec. = |  |
100 | x 9 |  m |
= 20 m. |
| 45 |
A beats B by 20 metres.
Discussion:
13 comments Page 2 of 2.
Purushotham Reddy said:
7 years ago
20P---28P------100P.
A---- B ---- C.
Here, the difference between B and c is 8 points when you calculate only for 80 Points (from B to 100).
So 8 Points - 80 Points.
But we need for 100 points.
Then 8p -80p.
10P-100P.
Hope you understand.
A---- B ---- C.
Here, the difference between B and c is 8 points when you calculate only for 80 Points (from B to 100).
So 8 Points - 80 Points.
But we need for 100 points.
Then 8p -80p.
10P-100P.
Hope you understand.
Sheth said:
5 years ago
Time ratio = 36:45 = 4:5.
Speed ratio = 5:4.
when A complete 5 B complete 4.
A complete 100 B complete 100*4/5 = 80m so A beat B by 20m.
Speed ratio = 5:4.
when A complete 5 B complete 4.
A complete 100 B complete 100*4/5 = 80m so A beat B by 20m.
(4)
Madhu said:
4 years ago
Lets time ratio is =
A : B A : B
36:45 => 4:5.
The speed ratio is;
A : B
5 : 4.
If a completes 100 with 5 units of speed, then B completes 80 with 4 units of speed.
A : B A : B
36:45 => 4:5.
The speed ratio is;
A : B
5 : 4.
If a completes 100 with 5 units of speed, then B completes 80 with 4 units of speed.
(2)
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