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 1 of 5.
Tejveer said:
1 decade ago
Why you multiply with 2 in 2(3x+2x) =1600 ?
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.
Chandrika said:
1 decade ago
Why multipty 2(3x+2x)=1600?
Hema said:
1 decade ago
Sankar you are wrong, the formula for perimeter is 2(l+b) =1600.
Then subs the value for l and b which means 2 (3x+2x) =1600.
6x+4x=1600 then x=160.
Then subs the value for l and b which means 2 (3x+2x) =1600.
6x+4x=1600 then x=160.
Tapas sethy said:
1 decade ago
How length equal to 480 and breadth equal to 320?
Sathis said:
1 decade ago
Hi ashok just explain briefly.
How to apply in s=d/t.
How to apply in s=d/t.
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