Barbed wire is to be put around a rectangular flowerbed measured 20 m by 12 m. If poles are erected after every one so that the barbed wire can be put around it. How many poles will be needed in all
Answers
Answered by
4
Answer:
analytics partners Learn more
Got it!
careerbless.comsearch careerbless.comShare/Follow
Go Back
29. A rectangular plot measuring
90
metres by
50
metres needs to be enclosed by wire fencing such that poles of the fence will be kept
5
metres apart. How many poles will be needed?
A.
30
B.
44
C.
56
D.
60
answer with explanation
Answer: Option C
Explanation:
Perimeter of a rectangle
=
2
(
l
+
b
)
where
l
is the length and
b
is the breadth of the rectangle.
Length of the wire fencing
= perimeter
=
2
(
90
+
50
)
=
280
metre
Two poles will be kept
5
metres apart. The poles will be placed along the perimeter of the rectangular plot, not in a single straight line which is very important.
Hence, number of poles required
=
280
5
=
56
Similar questions