Question

1. Find the circumference of a circle whose area is equal to the sum of areas of two circles of radii 12 cm and 5 cm.


2. The outer diameter and inner diameter of a circular path are 728 metre and 700m respectively. Find the width and area of the circular path. ( Take ㄫ = 22/7 )


3. A metal cube of edge 6 cm is melted and cast into a cuboid whose base is 3.600.6 0 cm. Find the height of the cuboid. Find also the surface areas of the cube and the cuboid.


4. The dimensions of a rectangular solid are as 4:3:2 and its TSA is 1300 cm2. Find its length, breadth and height.






5. The horizontal cross section of a water tank is in the shape of a rectangle with a semicircle at one end as shown in the figure. The water is 5m deep in the tank, calculate the volume of water in the tank.


6. Three metal cubes with edges 6 cm, 8 cm and 10 cm respectively are melted together and formed into a single cube. Find the diagonal of this cube.

Answer 1

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