1) Perimeter of a square is 20 cm, then what will be the area of that square. 2)
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 mº, find the total cost of colouring the wall.
plz help me to solve this problem
I will give 21 points
Answers
Answer:
1) Perimeter of square is 20cm,
=>side = 20/4
=5
=>area is equal to 2(5)
=10cm²
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Answer:
1. 25 cm sq.
2.rs 1300
Step-by-step explanation:
1. perimeter of square = 4×sides
=> 20 = 4 × s (let the sides be s.)
=> 20÷4 = s
=> s = 5
therefore side = 5 cm
now,
Area of square = side × side
= 5 × 5
= 25 cm sq.
2. Area of wall = length × breath
= 5 × 3
= 15 m sq.
area of gate = length × breath
= 2×1
= 2 m sq.
Area of wall - area of gate (because only wall is going to be painted)
= 15 - 2
= 13 m sq.
cost of colouring = 13 × 100
= rs. 1300
therefore cost of painting = rs 1300.
hope this will help