Question

The cost of a toy telephone is the same as cost of 4 balls. Express the statement as a equations in two variable. Also find the cost of getting 2 toy telephone packed, if cost of 1 ball is rs5 and there is a fixed cost of 2 for packing a toy telephone

Answer 1

Let the cost of 1 telephone = Rs x
Let the cost of 1 ball = Rs y
$\Rightarrow x=4y$ (cost of 1 telephone = Rs. x is equal to cost of 4 balls i.e.4xy)
cost of 2 telephones$=2x=2x4y=8y=8\times 5$(cost of 1 ball = Rs. 5)
$=40$
Packing cost for 2 telephone = $2\times 2=Rs.4$
Total cost = cost of telephones + packing cost
= 40 +4
= Rs. 44.