abbreviations of ba as bc CM cd DVD am pm
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We have,ABCD is a rectangle let its length AB='a' and its breadth BC='b' So, Area of rectangle ABCD=length×breadth∴Area of rectangle ABCD=a×b ...(1)Now, area of ∆BEF=7 cm2⇒12×EF×BF=7 cm2 ...(EF=AB='a' from the fig)⇒12×a×b2=7 cm2⇒a×b=7×2×2 cm2⇒a×b=28 cm2 ...(2)Thus, from (1) and (2)we get, Area of rectangle ABCD=28
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