Question

If the cost of 18 pens is Rs. 234, find the cost of a dozen pens.

Answer 1

Answer:

156₹

Step-by-step explanation:

cost of one pen=234÷18

=13₹

cost of dozen pens(12pens)=

13×12=156₹

Answer 2

Answer:

156

Step-by-step explanation:

using unitary method.

Also, remember a dozen = 12pens

Solution ,

cost of 18 pens = Rs.234

thus cost of 1 pen = x

cross multiply

x = 234/18 = 13

So, cost of 1 pen is 13

therefore , cost of 12 ( dozen ) pens

= 13×12 = 156

××××

it can also be done directly by taking

cost of 18 pens = Rs.234

thus cost of 12(dozen) pens = x

x = 234×12 / 18

= 156

Hope this helps :)