Question

Q-6 Solve the following problems.

1) Perimeter of a square is 20 cm, then what will be the area of that

square.

2) A gate having dimensions 2 m X 1 m is in the wall of 3 m X 5 m. If

the cost of colouring is Rs. 100 per m2

, find the total cost of colouring

the wall.​

Answer 1

Answer:

1)25m2

2)1300rs

Step-by-step explanation:

1) perimeter of square=4×side

20=4×side

side=5

therefore,area of square=side*2

=5*2=25m2

2)area of gate =lb

=2×1=2m2

area of wall=lb

=3×5=15m2

therefore,the area for colouring=

area of wall -area of gate

15-2=13m2

cost of colouring=13×100

=1300rs

Answer 2

Answer:

1- 16cm²

2- 1300rupees

Step-by-step explanation:

1- perimeter of square-20cm

=4×s= 20cm

4s=20= s= 20/4=5

Area of square in is side×side

So area = 5×5 = 25cm²

2. Area of wall = 15m². 1

Area of wall = 2m². 2

Subtract 2 from 1

= 13m²

Colouring cost = 13m²

13m²×100= 1300 rupees