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Unitary Method

If the beach ...

Question

If the beach loses 3 cm of sand each year, how many cms will it lose in 15 years?

A

45

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B

30

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C

12

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D

5

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Solution

The correct option is A
45

The beach loses 3 cm of sand in 1 year
$\Rightarrow$ Value of 1 part = 3 cm
$∴$ Value of 15 parts = $3 \times 15 = 45 c m$

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