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2. In a workshop, a mechanic uses a jack with a force of 120 pounds to lift a car with
a mass of 1 350 kg. State the ratio of the mass of the car to the force required to lift
the car. Express the ratio in its simplest form. (1 pound = 0.45 kg)

3. The table shows the number of boys and girls in three Form 1 classes.
Students Class 1 Amanah Class 1 Bestari Class 1 Cekap

Boys 12 9 9

Girls 16 20 12
(a) Which classes have equivalent ratios of the number of girls to the number of
CHAPTER
4 boys?
(b) Write the ratio of the number of girls in class 1 Amanah to the number of girls
in class 1 Bestari to the number of girls in class 1 Cekap in the form of a : b : c.
(c) Class 1 Amanah and class 1 Bestari are combined during the Physical Education
and Health Education lesson. Find the ratio of the number of girls to the number
of boys in the combined class. Express your answer in its simplest form.

4. Identify and determine the possible equivalent ratios for each of the following.
is equivalent to 1 : 5 as 4 : 9 : 2 as 37 : 74 as 6 : 1 as 0.3 : 1.2 : 0.5

5. Identify and determine the equivalent ratios of the shaded parts in each of the
following diagrams.
(a)

(b)

6. A farmer prepares a soil medium by mixing 3 parts of loamy soil, 2 parts of peat and
1 part of river sand. Identify and determine two possible equivalent ratios for this
soil medium.

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