Question

Avneet buys 9 square paving slabs, each with a side of 1/2 m. He lays them in the form of a square.
(b) Shari does not like his arrangement. She gels him to lay them out like a cross. What is the perimeter of her arrangement [(Fig 10.7 (ii)]

Answer 1

perimeter of the given 2 sapes are same
perimeter is =1/2×4
=2
perimeter of 1 square is 2 m
perimeter of 9 square is2×9=18

Answer 2

i ) Perimeter of the figure ( a )

= 4 × side length

= 4 × 3 slabs

= 4 × 3 × 1/2 m

= 6 m

ii ) Perimeter of figure ( b )

= 4 × 5 slabs

= 4 × 5 × 1/2

= 10 m

I hope this helps you.