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Question

$$20\%$$ of the length of a flagpole is painted green, $$45\%$$ is painted yellow and the remaining red. If the length of the pole is $$18 \,m,$$ what length of it is painted red ?


Solution

Length of pole $$= 18 \,m$$
Percentage of pole which is painted green $$= 20\%$$
Percentage of pole which is painted yellow $$= 45\%$$
and remaining pole $$= 100 - (20 + 45) = 35\%$$
and it is painted red
Length of pole which is painted red
$$= 35\%$$ of $$18 \,m  = \dfrac{35}{100} \times 18$$
$$= \dfrac{63}{10}$$
$$= 6.3 \,m$$

Maths

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