Rates and variations questions | form three Basic Mathematics

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

1. Write down the equation connecting y, x and z.
2. 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.

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UNSOLVED

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?.

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UNSOLVED

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.

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UNSOLVED

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

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UNSOLVED

The area of a circular sector containing a given angle varies as the square of the radius of the circle. If the area of the sector is 2cm² when the radius is 1.6cm, find the area of the sector containing the same angle when the radius of the circle is 2.7cm.

Answer / Solution

UNSOLVED