VARIATIONS FORM 5 KSSM

• p varies directly as q and inversely as r.

• p varies directly as q and r.

• p varies directly as the cube of q and inversely as r.

• p varies directly as the cube root of q and inversely as r

It is given that y varies directly as the square root of x and inversely as z. If y = 7 when x = 196 and z = 0.5, write an equation to relate y, x and z.

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• 
• 
• 

• 
• 
• x = 3, y = 1

• 

• 0.4

• 0.5

• 0.125

• 0.064

• 0.5

• 0.6

• 125

• 216

• 1.2

• 1.3

• 0.3

• 0.2

The power, P watts, of an electrical circuit varies directly as the square of the voltage, V volts, and inversely as the resistance, R ohms. It is given that the power in a certain electrical circuit is 57.6 watts when the voltage is 24 volts and the resistance is 12 ohms. Find the value of the resistance, in ohms, when the power is 45 watts and the voltage is 15 volts.

• 8

• 6

• 10

• 4

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• 

Puan Sofia distributes an amount of apples equally into few small packages. What is the change in the number of apples in each package if the number of packages increases two times?

• The number of apples in each package increases two

  times.

• The number of apples in each package decreases two times.

• The number of apples in each packages is reduced by two

  apples.

• The number of apples in each packages is added by two apples.

It is given m varies directly as n and inversely as the cube of p. If m = 3.75 when n = 40 and p = 2, calculate the value of m when n = 6 and p = 0.5.

• 32

• 40

• 36

• 35