## Question 40

If *x* varies directly as the square of *P* and inversely as *Q*, and *x* = 25 when *P* = 4 and *Q* = 2, find *x* when *P* = 6 and *Q* =3

Maths is funny

loading...

If *x* varies directly as the square of *P* and inversely as *Q*, and *x* = 25 when *P* = 4 and *Q* = 2, find *x* when *P* = 6 and *Q* =3

*x* varies directly as *y*^{2} and *x* = 4, when *y* = 6. Find the value of *y* when *x* =16.

*P* varies directly as *Q* and inversely as *R* , when *Q* = 36 and *R* =16 , *R* = 27. Find the relation between *P*, *Q* and *R*

*y* varies directly as *w ^{2}* . When

The pie charts above shows the statistical distribution of 80 students in five subjects in an examination. Calculate how many students offer Mathematics

$\begin{align} & \text{If }r\text{ varies inversely as the square root of }s\text{ and }t\text{ how does }s\text{ vary with }r\text{ and }t. \\ & (A)\text{ }s\text{ varies directly as }r\text{ and }t \\ & (B)\text{ }s\text{ varies inversely as }r\text{ and }{{t}^{2}} \\ & (C)\text{ }s\text{ varies inversely as }{{r}^{2}}\text{ and }t \\ & (D)\text{ }s\text{ varies directly as }{{r}^{2}}\text{ and }{{t}^{2}} \\\end{align}$

$\begin{align} & P\text{ varies jointly as }m\text{ and }u,\text{ varies inversely as }q.\text{ Given that }p=4,\text{ }m=3\text{ } \\ & \text{and }u=2\text{ when }q=1,\text{find the value of }p\text{ when }m=6,u=4\text{ and }q=\tfrac{8}{5} \\ & (A)\text{ }\tfrac{128}{5}\text{ (B) }15\text{ (C) 10 (D) }\tfrac{288}{5} \\\end{align}$

The angles of a polygon are given by *x*, 2*x*, 3*x*, 4*x*, and 5*x* respectively. Find the value of *x*

*U* is inversely proportional to the cube of *V* and *U* = 81 when *V* = 2. Find *U* when *V*=3

If *y* varies directly as $\sqrt{n}$and *y* =4 when *n* =4, find *y* when $n=1\tfrac{7}{9}$