Question

I wish to seal an envelope of length 12 cm
and breadth 7 cm, from all the sides. What
is the length of the tape needed?​

Answer 1

Answer:

P=2(l+b)

P=2(12+7)

P=2×19

P=38cm

I hope this will help you.

Answer 2

length= 12 cm

breadth 7 cm

perimeter = 2(l+b)

= 2(12+7)cm

= 2×19

=38cm

hence length of the tape needed is 38 cm