Question

The local hardware store wants to increase their inventory. last year 15 electric screwdrivers cost them $300. at the same cost, how much would 45 screwdrivers cost them this year?

Answer 1

Cost of 45 screwdrivers will be = $900

Explanation:

Last year 15 electric screwdrivers cost to the local hardware store = $300

So per screwdriver cost =
`\frac{\text{Total cost}}{\text{Total number of screw drivers}}`

=
`(300)/(15)`

= $20

Now we have to calculate the cost of 45 screw drivers.

Since cost of 1 screwdriver = $20

So cost of 45 screwdrivers = 20×45 = $900