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.
Answers
Answer:
1) 5 cm 2) ₹1300
Step-by-step explanation:
1) perimeter of square= 4× side
20 cm = 4 × side
20÷4 = side
5 cm = side
2) area to be colored= area of wall - area of gate
3×5 - 2×1
15 m square - 2 m square
= 13 m square
cost of colouring = ₹ 13×100 = ₹1300
Step-by-step explanation:
1) Perimeter of square = 20cm
4*side = 20cm
side = 5cm
Area of square = side*side
= 5*5
= 25 cm^2
2) Area of gate = 2*1
= 2m^2
Area of wall = 3*5
= 15m^2
Area of wall except gate = 15-2
= 13m^2
Cost of colouring of per m^2 = 100Rs.
Cost of colouring of 13m^2 = 13*100
= 1300Rs.