10. If the length of a rectangle is doubled and breadth is halved, then what would be the effect on its
perimeter and area?
Answers
Answered by
91
Solution :
Let us assume that the rectangle initially has a length of a units and a breadth of b units .
Area Of Rectangle :
=> [Length × Breadth ]
=> ab
Perimeter of the rectangle :
=> 2 [Length + Breadth ]
=> 2[ a + b]
Now , the length of the rectangle is doubled and the breadth is halved.
New Length :
=> 2a
New Breath :
=> b/2
New Area :
=>{ 2a } × { b/2}
=> ab
New Perimeter ;
=> 2 [ 2a + b/2 ]
=> 2 [ 4 a + b]/2
=> 4a + b
Thus , we can observe that the area remains constant while the perimeter changes by 2a - b units .
Answered by
1
Answer:
1.the perimeter will be doubled not halved
2. but their area will be halved
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