Question

please tell the answer

please​

Answer 1

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Given:

Pencil cost Rs 96 per score

Ball pen cost Rs 50.40 per dozen

To find:

Ratio of price of pencil to price of ball pen = ?

Solution:

➜ 1 score = 20 units

➜ 1 dozen = 12 units

➜ 1 score pencil cost Rs 96

➜ 20 pencils cost Rs 96

➜ 1 pencil cost Rs 96×1/20 = Rs 4.8

______________________________________

➠ 1 dozen ball pen cost Rs 50.40

➠ 12 ball pens cost Rs 50.40

➠ 1 ball pen cost Rs 50.40×1/12 = Rs 4.2

$\\ \dfrac{ Ratio \: of \: price \: of \: \: pencil }{ Ratio \: of \:price \: of \: ball \: pen} = \dfrac{4.8}{4.2} \\ \\ = \dfrac{48}{42} \\ \\ = \dfrac{8}{7}$

Required answer:

Thus, the ratio of price of pencil to that of price of ball pen is 8:7

Knowledge Booster:

# We can find price of things by unitary method ( cross multiply)

10 chocolate = Rs 10

1 chocolate = 10 × 1/ 10 = Rs 1

# Multiply accordingly by 10, 100 to avoid decimals

# Solve more such questions to get good hold on it