Saturday, May 24, 2014

Class 8

Grand Test 2



1. Find the surface area of a sphere with radius 3cm.                                                                                    [4]
2. The sum of the numerator and denominator of a fraction is 17. If 3 is added to the numerator,
     the value of the fraction will be 1. What is the fraction?                                                                          [6]                   
3. Draw the graph of the equation                                                                                    [8]
X

-5
-4
-3
-2
-1
 0
1
2
3
 Y

- 8


4

2
-2


scale is
2 cm = 1 unit on x-axis
1 cm= 1 unit on y-axis
From the graph find
          a) Co-ordinates of maximum point point. (          ,          )
          b) The value of x for which y= -3 and - 8 is  _________________ and ____________
          c) The value of y for which x= -4.5 and 1.6 is ________________ and ____________
4. Solve the following simultaneous equation using graphical method:                                                         [4]
              ;   
5. A cone has a circular base of radius 5 cm and a height of 12 cm. Find the curved surface area
    of the cone.                                                                                                                                                             [4]
6. A basket ball has a volume of 36000 cm3. Find the radius.                                                                        [4]
7. A solid metal ball of radius 3cm is melted and the metal obtained is recast to form a solid circular
    cone of radius 6cm. Find the height of the cone.                                                                                       [5]
8. The pi chart shows the nutritional composition of a fast-food                                                                   [5]
    product.
   a) calculate the value of x.
   b) what is the percentage of fat in the fast-food product?
   c) given that one such fast-food product contains 120g of
      carbohydrates, calculate the total weight of the fast-food.

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