Question

if the cost of 5 copies is rs 12.50 then find the cost of 7 copies​

Answer 1

Given:-

• Cost of 5 copies is rs 12.50.

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To find:-

• Cost of 7 copies.

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Solution:-

• No. of copies = 5

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Firstly,

• we have to find out the cost of 1 copy.

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⇛ Cost of 5 copies ÷ No. of copies

⇛ 12.50 ÷ 5

⇛ Rs.2.5

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Then,

• finding the cost of 7 copies.

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⇛ Cost of 1 copy × 7

⇛ 2.5 × 7

⇛ Rs.17.5

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Hence,

• the cost of 7 copies is Rs.17.5.

Answer 2

Answer:

$since \: \: cost \: of \: 5 \: copies \: = rs \: 12.50 \\ therefore \: cost \: of \: 1 \: copy \: = rs \frac{12.50}{5} \\ cost \: of \: 7 \: copies \: = rs \: \frac{12.50}{5} \times 7 \\ =rs \: 2.50 \times 7 \\ = rs \: 17.50$