The area of a rectangle is equal to the area of a circle with circumference equal to 220 m What is the length of the rectangle of its breadth is 50 m ?
1). 56 m
2). 83 m
3). 77 m
4). 69 m
Ciircumference = 2*(22/7)*r = 220
Hence, r = 35
Now, area of circle = (22/7)*35*35 = 3850
Area of rectangle is same as that of circle
Area of rectangle = 3850
Length * breadth = 3850
length = 3850/50 = 77m
Therefore, option C is correct answer.
2. If the area of a circle and a square are equal, then the ratio of their perimeter is
3. Each side of an equilateral triangle is 6 cm. Find its area .
7. If the length of the side of an equilateral triangle is 8 cm, what is its area?
10. If diagonal of a cube is $\sqrt{12}$ cm, then its volume in cubic cm is :