Question

length of a triangle is 12 cm more than two times of its breadth.If area of rectangle is 270 square centimeters. calculate length and breadth of the rectangle​

Answer 1

Answer:

Let breadth=x

⇒ Length=2x

⇒ Area of rectangle=2x×x

=2x

2

After the given changes;

length=2x−5

Breadth=x+5

Area=2x

2

+75

⇒(2x−5)(x+5)=2x

2

+75

2x

2

−5x+10x−25=2x

2

+75

5x=75+25=100

⇒x=20

⇒ Breadth=20cm

Length=40cm.

Step-by-step explanation:

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Answer 2

Answer:

Let breadth=x

⇒ Length=2x

⇒ Area of rectangle=2x×x

=2x

2

After the given changes;

length=2x−5

Breadth=x+5

Area=2x

2

+75

⇒(2x−5)(x+5)=2x

2

+75

2x

2

−5x+10x−25=2x

2

+75

5x=75+25=100

⇒x=20

⇒ Breadth=20cm

Length=40cm.