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So it has 2 sides of 5 and 2 sides of 3 yards so the perimeter is 5 + 5 + 3 + 3 = 16 yards
Perimeter = 2*(L+W) = 2*(5+3) = 2*8 = 16 yards.
Perimeter = 5*8 = 40 yards
10 yards * 5 yards = 9.144 metres * 4.572 metres = 41.806 m2 (to 3 dp)
It is: 4*5 = 20 yards