Saturday, March 12, 2011

Class 8th Volume and surface Area

PH: 9835859669     JSUNIL TUTORIAL   PUNJABI COLONY GALI01
Class 8th Volume and surface Area
Q1.
The diameter of a closed cylindrical water storage tank is 14mand its height is 20m. Find the capacity of the tank.
Q2.
A cylindrical tank has a capacity of 5632m3. If the diameter of its base is 16m, find its depth.
Q3.
The volume of a circular iron rod of length 5cmis 3850cm3. Find its diameter.
Q4.
The diameter of a closed cylindrical water storage tank is 14m and its height is 20m. Find the capacity of the tank.
Q5.
Find the volume of the cylinder whose base radius is 3mand height is 12m.
Q6.
Find the volume of a cube whose total surface area is 486cm2.
Q7.
Find the volume of the cube whose edge measures 7m.
Q8.
The dimensions of a rectangular water tank are 12mby15mby20m. How many litres of water does it hold when filled to the brim?
Q9.
Find the volume of the cuboid with length=5m, breadth=6m and height=7m.
Q10.
Find the total surface area of the cylinder whose radius of the base=10.5cmand height=18cm.

11. The curved surface area of a right circular cylinder of height 20 cm is 100 cm2. Find the radius of the base of the cylinder. (Take π = 22/7)                    
0.8 cm
12. The outer diameter of a pipe is 1.6 m and it is 15 m long. Find (i) its outer curved surface area (ii) the cost of painting the outer surface of the pipe at the rate of Rs. 15 per m2.  
1131 Rs.
13. Khushi cap is in the form of a right circular cone of base radius 15 cm and the height20 cm. Find the area of the sheet required to make 5 such caps.                                                    
5893 cm2
14. Curved surface area of a cone is 220 cm2 and its slant height is 10 cm. Find total surface area of the cone.           374 cm2
15. The surface area of a sphere is 440 cm2, what will be its diameter?         11.8 cm     

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