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Question

The length of a rectangle is 10 cm and breadth is 7 cm. What will be the area of a rectangle formed by joining 12 of these rectangles?

A
840 cm2
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B
840 cm
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C
84 cm2
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D
440 cm2
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Solution

The correct option is A 840 cm2
Given:
The length of the rectangle, l=10 cm
The length of the rectangle, b=7 cm

Area of a rectangle (A) is the product of its length and breadth.
A=lb
A=10 cm×7 cm
A=70 cm2

Area of a rectangle formed by joining 12 of the rectangles is:
A=12A
A=12×70
A=840 cm2

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