Correct option is C
Circumference of circle
The ratio of rectangle = 4:7
Parameter of rectangle = 2(4x+7x) = 44
x = 2
therefore, the sides are 8 cm and 14 cm.
Therefore the area of the rectangle
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Question
A circular wire of radius 7cm is bent to form a rectangle whose sides are in the ratio 4 : 7 what is the area of the rectangle so formed?
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- 1)
If the perimeter of a square is doubled, then its area becomes
- 2)
A square tank holds 15,000 litres of water. If its depth is 2.5 m, find the length of one side of its base.
- 3)
A triangle ABC with sides 3 cm, 4 cm and 5 cm is revolved about the side 3 cm. Find the volume of the solid so obtained. (Use π = 3.14)
- 4)
A square park has an area equal to the area of a rectangle whose length exceeds its breadth by 9 m and the breadth is half the side of the square. Find the side of the square.
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If the areas of three adjacent faces of a cuboid are x, y, z square units, respectively, then the volume of the cuboid is:
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A cylindrical water tank has a base radius of 7 m and a height of 10 m. Water is filled into the tank at a constant rate. After filling the tank completely, 5% of the water leaks out due to a crack at the bottom. The remaining water is transferred into another cylindrical tank whose base radius is 5 m. Find the height of water in the second tank.
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A cube is painted on all faces and then cut into 27 smaller cubes of equal sizes. How many smaller cubes have exactly two faces painted ?
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A solid is in the shape of a cone mounted on a hemisphere. The radius of each is 6 cm and the total height of the solid is 14 cm . Find the surface area of the solid.
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The sides of a triangular plot are in the ratio of 3:5:7 and its perimeter is 300 m. Find its area.
