Question

Q1) The total cost of painting a wall is 2500 rupees at 100 rupeeaper sq.m. the perimeter of the wall.

Q2) Ajit buys 9 square paving slabs with a side of 1m. He lays them in the form of a square.But Sonal doesn't like this, she lays them in the form of a cross. Which arrangement has greater perimeter?(Draw rough figure, send a picture of it please!)

Q3) The area of a square is 100 sq.m. What would be the new area if its side is:

a) reduced by 3m.
b) increased by 5m.

Answer 1

3.
Area of square = a^2
ar. of square = a^2 = 100
a=
$\sqrt{100}$

a=10
so
a) 10- 3=7= side
so 7x7 = 49m^2
b) 10+5 = 15= side
so 15x15= 225 m^2