Question

A nursery owner buys 8 panes of glass to fix some damage to his greenhouse. The 8 panes cost ​$18.80. ​Unfortunately, breaks 3 more panes while repairing the damage. What is the cost of another 3 panes of​ glass?

Answer 1

$18.80/8= $2.35 each
$2.35X 3= $7.05
Answer $7.05 for 3 more panes

Answer 2

Explanation:

The cost of another 3 panes of glass would be

Solution:

Given, Number of panes of glass bought = 8

Cost of 8 panes of glass =

Number of broken panes of glass = 3

We have to find the cost of 3 panes of glass

By unitary method, If 8 panes of glass costs , then the cost of one pane of glass will be as follows,

Therefore, for 3 panes of glass it would be

Unitary method:

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value. In essence, this method is used to find the value of a unit from the value of a multiple, and hence the value of a multiple.