3. A rectangular sheet of paper is 121/2 cm long and 102/3 cm wide. Find its perimeter .​

189 cm

Step-by-step explanation:

the area of a perimeter is 2L+2w while l is length and w is width

in this case, 121/2 is the length and 102/3 is the width.

using the formula it should be

121/2 x 2 +102/3 x

= 121 + 68

=189 cm

i hope this helps.

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step-by-step explanation:

b is the right answer