The area of a rectangle is 400 cm which is equal to 25% of the area of a square. What is the side of the square ?
A60 cms
B40 cms
C25 cms
D20 cms
A60 cms
B40 cms
C25 cms
D20 cms
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A cow is tied on the corner of a rectangular field of size 30 m ×20 m by a 28m long rope. The area of the region, that she can graze, is :