Rates and variations questions | form three Basic Mathematics

Find Rates and variations examination questions, form three Basic Mathematics in acaproso.com

Question

If q∗r =q - 4r, find x given that 3∗(1∗x) = 27.

Mathematical Calculation

A map is drawn to a scale of 1:25000. The length of the road on the map is 20cm. What is the actual length of the road ?

Mathematical Calculation

If $aast b=3a^2 -b^3$ , evaluate $(4ast3)ast -5$ .

Mathematical Calculation

The variable v varies directly as the square of x and inversely as y . Find v when x = 5 and
y = 2 ; given that when v = 18 and x = 3 the value of y = 4 .
The temperature (Ti) inside a house is directly proportional to the temperature (To) outside the
house and is inversely proportional to the thickness (t) of the house wall. If Ti = 32°C when
To = 24°C and t = 9cm , find the value of t when Ti = 36°C and To = 18°C.

Mathematical Calculation

If X varies directly as Y and inversely as W, find the values of a and b in the table below.

Mathematical Calculation

If P * Q is defined as 3 P − Q, Evaluate ( 5 * − 3 ) * 2.

Mathematical Calculation

The variable y varies directly as x and inversely as square of x.

Write down the equation connecting y, x and z.
If x is increased by 5% and z is decreased by 10% write down the new equation connecting y,x and z and hence find the percentage change in y.

Mathematical Calculation

It takes 24 days for 20 people to accomplish a certain task. How long could it take for 30 people to complete the same task?.

Mathematical Calculation

The variable y is directly proportional to x² and inversely proportional to z. If y=27 when x=3 and z=1, find y when x=6 and z=9.

Mathematical Calculation

A car travelling steadily covers a distance of 480km in 25minutes. what is its rate in m/s.

Mathematical Calculation

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