3. Find the perimeter and area of a rectangle of sides:
(a) 5 cm and 9 cm (b) 11 m and 22 m
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perimeter of A rectangle=2×(l+b)
area of rectangle=l×b
a)2×(9+5)CM
=2×14cm
=28cm
area=9×5=45cm²
b)2×(22+11) CM
=2×33cm
=66cm
area=22×11=242cm²
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