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The length of a triangle exceeds …

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The length of a triangle exceeds its breadth by 7cm. If the length is decreased by 4cm and the breadth is increased by 3cm, the area of the new rectangle id same as the area of old rectangle. Find the length and breadth of the original rectangle.

Posted by Anandika Chakraborty 5 years ago

CBSE > Class 08 > Mathematics

2 answers

Anandika Chakraborty 5 years ago

Thanks

0Thank You

Yogita Ingle 5 years ago

B =x
L= x+7

Original Area =x×(x×7)=x^2+7x
New length =x+7-4=x+3
New breadth =x+3
New area =(x+3)(x+3)=x^2+6x+9
A2Q
=x^2+7x =x^2+6x+9
=x^2- x^2+7x=6x+9
=7x-6x=9
=x=9cm=Breadth
9+7=16cm=Length

2Thank You

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Posted by Monika 8B 5 months, 2 weeks ago

CBSE > Class 08 > Mathematics