1. The length of the ribbon required to cover a square having side Dois 2
w in the blanc.
The area of a square field is 625 am. Its each side measures
qular field with length 25m
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Answer:
Let ABCD represents the square field having each side of 20 mtr.
Let the cow is tied at point A by means of a 7 mtr long rope.
So the cow can move and gaze in the circular area having radius 7 mtr.
The maximum area that a cow can gaze is
=
4
1
πr
2
=
4
1
×
7
22
×(7)
2
=38.5sq.mtr
∴ The cow can gaze 38.5 sq. mtr are of the field.
If the length of the rope is doubled then r = 14 mtr.
The maximum area that a cow can gaze is
=
4
1
πr
2
=
4
1
×
7
22
×(14)
2
=154sq.mtr.
Increase in the gazing area = 154 - 38.5 = 115.5 sq. mtr
Increase in the gazing area is 115.5 sq. mtr.
Step-by-step explanation:
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