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Question 1 of 3
1. Question
The relationship between variables, x,y and z is [latex] y \propto \frac{z}{x}[/latex] . It is given that [latex]y= \frac{3}{5}[/latex] when z=6 and x =30. Calculate the value of x when y=18 and z=42.
Hubungan antara x, y and z ialah [latex] y \propto \frac{z}{x}[/latex]. Diberi bahawa [latex]y= \frac{3}{5}[/latex] apabila z=6 dan x=30. Hitung nilai x apabila y=18 dan z=42.
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Question 2 of 3
2. Question
It is given that y varies directly as the cube of x and =9 when x=3. Calculate the value of x when y=72.
Diberi bahawa y berubah secara langsung dengan kuasa tiga x dan y=9 apabila x=3. Hitung nilai x apabila y=72.
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Question 3 of 3
3. Question
The volume of a hemispherical bowl, [latex] Vcm^{3} [/latex], varies directly as the cube of its radius, r. By using k as a constant, express k in terms of V and r.
Isi padu suatu mangkuk hemisfera, [latex] Vcm^{3} [/latex], berubah secara langsung dengan kuasa tiga jejarinya, r. Dengan menggunakan k sebagai pemalar, ungkapkan k dalam sebutan V dan r.
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