Question

please solve 19,21,22

Answer 1

Answer:

19.the area is 16 cm

20.the cost of 24 kg is 90.00 rupees

21.I am small so I don't know

Answer 2

19.

Perimeter of square =4a

Perimeter of square =4cm (given)

∴ 4a =4cm

a = 1 cm

Area of square = a²

= 1cm × 1cm = 1cm²

Note : a= side of square

22.

(a) 0

(b) 1 and -1