Aptitude - Area - Discussion
Discussion Forum : Area - General Questions (Q.No. 14)
14.
A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 680 sq. feet, how many feet of fencing will be required?
Answer: Option
Explanation:
We have: l = 20 ft and lb = 680 sq. ft.
So, b = 34 ft.
Length of fencing = (l + 2b) = (20 + 68) ft = 88 ft.
Discussion:
18 comments Page 1 of 2.
Sreedevi said:
1 decade ago
How this (l+2b) comes. Can anyone help me?
(1)
Avinash Sheshadri said:
1 decade ago
L is given as 20ft and b can found using area of rectangle and it is obtained as b = 34ft.
So one of the side having 20ft is nt fenced so it should be
l+b+b = 20 + 34 + 34 = 88 ft.
So one of the side having 20ft is nt fenced so it should be
l+b+b = 20 + 34 + 34 = 88 ft.
Rajagopal said:
1 decade ago
It need not be l+2b. It can also be 2l+b (as they have mentioned only as 3 sides).
Arpitha said:
1 decade ago
@rajgopal: It cannot be 2l+b since they have mentioned that a side of 20ft has to be left.
(1)
Milap said:
1 decade ago
What is meaning of fencing ?
Vasundhara said:
1 decade ago
Why aren't we considering 2l as it is a rectangle having four side?
Ram said:
1 decade ago
Here b=34 how it was come?
Ishita said:
1 decade ago
Why is breadth more than length?
Amreen said:
1 decade ago
We can take the side of 20 metres anything as breadth or length.
AREA = L * B
GIVEN: AREA = 680
BREADTH = 20
:: LENGTH=680/20=34
FENCING MEANS PUTTING A COVERING ON THE BOUNDARIES. SO HERE THEY ARE SAYIN TO PUT ONLY ON THREE SIDES AND LEAVE THE SIDE WITH 20 METRES.SO ONLY 3 SIDES WILL BE COVERED.
HENCE =(2 SIDES OF 34 MTERES) + ( 1 SIDE OF 20 METRES)
=20+34+34=88 METRES
AREA = L * B
GIVEN: AREA = 680
BREADTH = 20
:: LENGTH=680/20=34
FENCING MEANS PUTTING A COVERING ON THE BOUNDARIES. SO HERE THEY ARE SAYIN TO PUT ONLY ON THREE SIDES AND LEAVE THE SIDE WITH 20 METRES.SO ONLY 3 SIDES WILL BE COVERED.
HENCE =(2 SIDES OF 34 MTERES) + ( 1 SIDE OF 20 METRES)
=20+34+34=88 METRES
(4)
Satti said:
9 years ago
How come l + 2b?
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