A sheet from a stamp album measures 30 CM by 30cm how many square stamps with sides measuring 3 CM can be pasted on it
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area of square shaped stamp= (3)²= 9 sq.cm
area of rectangular sheet= l×b= 30×30= 900 sq.cm
area 1 stamp used on sheet = 900/9 = 100 sq.cm
no. of stamps used= 100× 900= 90000
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