Question

The cost of 5 combs is Rs.30 .Find the cost of 15 combs

Answer 1

Answer:

cost of 5 combs =30

find the cost of 15 combs

we find cost of 1 comb =30÷5 =6

cost of 15 combs = 6×15 = 90 rs

Answer 2

Given :

• The cost of 5 combs is 30 rupees.

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Find :

• What is the cost of 15 combs.

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Concept :

• We can solve this question by using "Unitary method".

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• Unitary method is the method of finding the value of the single term or the cost of one and then multiplying it with the required number of times.

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Calculations :

• Cost of one combs:

→ 30/5

→ ₹6

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• Cost of five combs:

→ 6 × 5

→ ₹30

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• Cost of fifteen combs:

→ 6 × 15

→ ₹90

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Therefore, 90 rupees is the cost of fifteen combs.