Page 69 - Mathematics
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and expenditure = Tshs 1,078,000 = 21 13−
Hence, income : expenditure 8.=
= 1274000 Therefore, the ratio of males to all
1078000 club members is 8: 21.
13 Tanzania Institute of Education
= Example 4.6
11
= 13:11 Express the ratio 200 cm:1m in
Therefore, the ratio of income to its lowest form.
expenditure is 13:11. Solution
To find savings to income ratio, Using comparison of metric units,
start to calculate savings as follows: it is known that 1 m :100 cm. Since
= Tsh (1274000 1078000)− the units must be the same, then it
= Tsh 196,000 follows that,
196000
Thus, savings: income = 1274000 200cm:1m = 200 cm:100cm
= 2:1.
2:13= Therefore, the ratio 200 cm:1m
Therefore, the ratio of savings to in its lowest form is 2:1.
income is 2:13.
Example 4.7
Example 4.5
A special cereal mixture contains
A Mathematics club has 21 rice, wheat, and corn in the ratio
members of which 13 are females 2:3:5, respectively. If a bag of
and the rest are males. Find the the mixture contains 3 kilograms
ratio of males to all club members. of rice, how much corn does it
contain?
Solution
Given, total number of club Solution
members 21, Let x be the amount of corn in
=
number of females = 13 kilograms that a special cereal
Thus, number of males mixture contains. Mathematics Form One
= total number of club members The ratio of rice to corn is given
− number of females by 2:5 = 3 kg: x kg
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Mathematics form 1.indd 63 25/10/2024 09:51:18
Mathematics form 1.indd 63
