Question

The length of the triangle is 5 cm that is breadth. If the length is doubled and breadth trebled then the area of new rectangle is increased by the area of original rectangle 70cm². Find the length and breadth of the rectangle.
Choose the right answer. Explain. A. 5ans 20 and B. 7and 2
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Answer 1

Answer:

B. 7 and 2

Step-by-step explanation:

if we choose 7and2.

area of rectangle-lenghthXbreadth.

-7X2

-14cm2

then length is doubled 7 X 2-14 and breadth is trebled-2 X 3-6.

the length of new rectangle is 14cm and breadth of new rectangle is 6cm

area of new rectangle-14 X 6

-84

the difference between first rectangle area and second rectangle area - 84-14 is equally 70 THANK YOU