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20 cm. Find the length of AB.
(11) Find the perimeter of a square whose area is twice the area of a field with area 269.12 m²
(12) For the Independence Day drill, 1450 students had to stand in such a manner that number of rows should
be equal to number of columns. How many children were left out in this arrangement? How many rows
were made?
(13) Find the number of digits in the square root of (i) 253009 and (ii) 1089.
(14) The area of a square plot is 40401 m. Find the length of side of the plot.
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