Question

The cost of 10 pencils is 170, what will be the cost of 7 pencils?

Answer 1

cost of 10 pencil = RS 170

cost of 1 pencil = cost of pencil / no of pencil.

=170÷10=17

cost of 1 pencil= RS 17

cost of 7 pencils = 7 × RS 17

cost of 7 pencils = RS 119

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Answer 2

Answer:

The cost of 7 pencils is 119

Step-by-step explanation:

Given information,

The cost of 10 pencil is 170

We have to find out the cost of 12 pencils.

As,

The cost of 10 pencils = 170

The cost of one pencil = $\frac{the \: cost \: of \: 5 \: pencile}{5}$

The cost of 1 pencil = $\frac{170}{10}$

The cost of 1 pencil = 17

The cost of 7 pencils= The cost of 1 pencil × 7

The cost of 7 pencils = 17 × 7

The value of 7 pencils = 119

Hence,

The cost of 7 pencils is 119