Question

if the cost of 3 pens is 15.what is the cost of 6 pens?​

Answer 1

Answer:

30

Step-by-step explanation:

Cost of 1 pen = 15÷3 = 5

Cost of 6 pens 5×6 = 30

Answer 2

Solution!!

The concept of unitary method has to be used here. The value of multiple objects is given. We find the value of one object first and then the value of as many number of objects as mentioned. As we can see,

→ Cost of 3 pens = Rs 15

The value of 3 pens is given which is Rs 15. So, we'll just find out the value of 1 pen.

→ Cost of 1 pen = Rs 15 ÷ 3

→ Cost of 1 pen = Rs 5

We have the value of one pen. We have to find the value of 6 pens as asked in the question.

→ Cost of 6 pens = Rs 5 × 6

→ Cost of 6 pens = Rs 30