Question

A dozen exercise books cause $840.what is the cost of four of the same exercise book

280

200

300

260​

Answer 1

Explanation:

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`\underline{ \underline{ \large{ \tt{C \: O \: R\: R \: E \: C \: T \: I \: O \: N}}} }:`

• Dozen of exercise books costs $ 840. What is the cost of four of the same exercise book ?

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`\underline{ \underline{ \large{ \tt{G \: I \: V\:E \: N}}} }:`

• Cost of dozen of exercise books [ 12 exercise books ] = $ 840

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`\underline{ \underline{ \large{ \tt{T \: O \: F \: I \: N \: D}}}} :`

• Cost of four of the same exercise books

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`\underline{ \underline{ \large{ \tt{S \: O \: L\: U \: T \: I \: O \: N}}}} :`

• Firstly , Find the cost of 1 exercise book

`\text{Cost \: of \: 1 \: exercise \: book }= \tt{ (840)/(12) = \$ \: 70 }`

• Find the cost of 4 exercise books

`\text{Cost \: of \: 4 \: exercise \: books} = \tt{ \$70 * 4} = \boxed{ \tt{ \$280}}`

`\boxed{ \boxed{ \large{ \tt{Our \: Final \: Answer : \boxed{ \underline{ \tt{ \$ \: 280}}}}}}}`

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Answer 2

280 because 840 divided by 12 ( a dozen) is 70. So 70 times 4 books equals 280. Lmk if I’m wrong:)