Question

15 stamps of equal value cost Rs 18 how many stamps of the same value can be bought for Rs 36

Answer 1

30 stamps can be brought for Rs.36

Step-by-step explanation:

Let the cost of 1 stamp be x

Cost of 15 stamps = 15x

We are given that 15 stamps of equal value cost Rs 18

So, $15x=18$

$x=\frac{18}{15}$

No. of stamps can be bought for Rs.18/15 = 1

No. of stamps can be brought for Re.1=$\frac{15}{18}$

No. of stamps can be brought for rs.36 = $\frac{15}{18} \times 36=30$

Hence 30 stamps can be brought for Rs.36

#Learn more:

If 30 stamps of equal value cost rupees 150.00 how many stamps of the same value can be bought for Rs 200.00

https://brainly.in/question/7300621

Answer 2

/* We know that if the number of stamps increases then the cost also increases.

Therefore,

Number of stamps directly varies with the cost of the stamps */

$So, \frac{x_{1}}{y_{1}} = \frac{x_{2}}{y_{2}}$

$Here , \: x_{1} = 15 \: stamps , \: y_{1} = Rs\:18 \\x_{2} = \red{?} \: stamps , \: y_{2} = Rs\:36$

$By \: substituting \: \frac{15}{\red{?}} = \frac{18}{36}$

$\implies \frac{15}{\red{?}} = \frac{1}{2}$

$\implies \frac{\red{?}}{15} = \frac{2}{1}$

$\implies \red{?} = 2 \times 15 = 30$

Therefore.,

$\red { Number \: of \: stamps \: bought \: for \: Rs \: 36}$

$\green { = 30 }$

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