Question

Question 3

36 unit squares are joined to form a rectangle with the least perimeter. Perimeter of the rectangle is

(a) 12 units
(b) 26 units
(c) 24 units
(d) 36 units

Answer 1

Area of rectangle formed = 36 units
We have, $36=6\times 6$
$=2\times 3\times 2\times 3$
$=2^2\times 3^2$
$=4\times 9$
The figure formed should be rectangle but not square.
Perimeter of the rectangle when the sides of a rectangle are 4 cm and 9 cm.
$\therefore Perimeter$ $=2(l+b)$
$=2(4+9)$
$=2\times 13$
$=26units$