Question

find the cost of 30 candles at $12.60 per dozen​

Answer 1

Answer:

The cost of 30 candles will be Rs. 31.5

Step-by-step explanation:

The rate of candle is $12.60 per dozen​

This means the cost of 12 candles is $12.60

We will first find the cost of 1 candle

cost of 12 candles = $12.60

cost of 1 candle = 12.60/12

                          = 1.05

Now, we have to find the cost of 30 candles

cost of 30 candles = 30 × cost of 1 candle

                               = 30 × 1.05

                              = 31.5

Answer 2

Answer:

$ 15.75

Step-by-step explanation:

According to the information provided in the question it is given as

Cost of 30 candles =$12.60 per dozen​

We need to find  the cost of  30 candles

For this question we first find the value of 1 candles

As 1 dozen = 12 numbers

And its cost =12.60

So

Let us assume x is the cost of 1 candles

24=12.60

1=x

So by simple cross multiplication we get the cost of 1 candles

$24 x=12.60$

Hence

$x=\frac{12.60}{24}$

$x=0.525$

As x is the cost of 1 candles hence cost of  30 candles =

$30\times 0.525\\=15.75$

Cost of 30 candles =$ 15.75