Question

If the cost of 10 pencils is 90,then the cost of 19 pencils is ---------

Answer 1

Answer:

171

Step-by-step explanation:

1 pencil cost 9

19 pencil cost =19*9=171

Answer 2

Answer:

The cost of 19 pencils is 171

Step-by-step explanation:

Given information,

The cost of 10 pencils is 90.

We have to find out the cost of 19 pencils.

As,

The cost of 10 pencil= 90

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

The cost of 1 pencil = $\frac{90}{10}$

The cost of 1 pencil = 9

So,

The cost of 19 pencils = the cost of one pencil × 19

The cost of 19 pencils = 9 × 19

The cost of 19 pencils = 171

Hence,

The cost of 19 pencils is 171 .