Guys this is urgent. Do it step by step and I will make you as brainiest and also follow you. Plz do step by step
Answers
Answer:
kuch bhi samajh nahi aa raha
Answer:
Step-by-step explanation:
A1) Area of a square = Side*Side
Perimeter of Square = 4*Side
Therefore 320 = 4*Side
Side = 80 cm
Area = 80*80 = 6400 cm²
A2) Area of Rectangle = Length * Breadth
22* Breadth = 440
Breadth = 20
Perimeter of Rectangle = 2(length + breadth) = 2(20+22) = 2(42) = 84cm
A3) 130 = 2(30+ length)
65 = 30+ length
length = 35 cm
Area = 35*30 = 1050 cm²
A4) Area of Triangle = 1/2 * Base * Height
Area of Triangle = 1/2 * 4 * 3 = 12/2 = 6cm²
A5) Let base = 3x
Height = 2x
Area = 3x²= 108
x²= 36
x= 6
Hence base = 3*6 = 18
height = 2*6 = 12
A6) Diameter = 6cm
Radius = 3cm
Area = πr²= 3.14 * 9 = 28.26cm²
A7) Circumference = 2πr Radius = Diameter/2 = 3cm
2π*3 = 6 *3.14 = 18.84 cm
A8) Area of circle = πr²
Let radius be r1 and r2 respectively
Therefore ratios of area = r1²/r2² = 36/49
hence r1/r2 = 6/7
Circumference = 2πr
Hence ratio of circumference = r1/r2 = 6/7