Aptitude - Area - Discussion
Discussion Forum : Area - General Questions (Q.No. 1)
1.
The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is:
Answer: Option
Explanation:
| Perimeter = Distance covered in 8 min. = |  |
12000 | x 8 |  m = 1600 m. |
| 60 |
Let length = 3x metres and breadth = 2x metres.
Then, 2(3x + 2x) = 1600 or x = 160.
Length = 480 m and Breadth = 320 m.
Area = (480 x 320) m2 = 153600 m2.
Discussion:
48 comments Page 3 of 5.
Kritika said:
10 years ago
Perimeter of the park is actually the distance covered by the cyclist and hence we use the formula of distance, speed and time.
Fijo Francis said:
1 decade ago
Why we are not using 5/18 formula to convert into m/s?
Can any of you please explain me please ?
Can any of you please explain me please ?
Phuntsho said:
1 decade ago
I did not understand on how perimeter has a relationship with time and its distance. Please can you tell and explain me in detail. So that I can able to transfer my knowledge to my students.
Bhagyashri said:
1 decade ago
1hr is converted in to minutes. i.e 1hr = 60min.
1km = 1000m.
12km = 12000m.
12km/hr = 12000/60.
1km = 1000m.
12km = 12000m.
12km/hr = 12000/60.
Aniruddh said:
1 decade ago
@manjula: 12000 and 60 are, 12km/hour will be converted into metre...
1km=1000m hence 12km=120000m and hr is converted as sec.1hr is 60 sec
1km=1000m hence 12km=120000m and hr is converted as sec.1hr is 60 sec
R.prabhakaran said:
1 decade ago
Why multiply 2(3x+2x)=1600 ?
Divya said:
1 decade ago
Perimeter formule 2(l+b), so we are using.
Sankar said:
1 decade ago
You said perimeter is 2 (l*b) but in above step perimeter we found as 1600m.
How is it possible two perimeter with different ans?
How is it possible two perimeter with different ans?
Ashok said:
1 decade ago
instead of using perimeter just take the total distance as 10x coz length 2 times of 3x and breadth 2 times of 2x
add both u will get 10x
and just find x usin s=d/t
add both u will get 10x
and just find x usin s=d/t
Manjula said:
1 decade ago
From where does 12000 and 60 come.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers