Question

A radio-controlled helicopter sells for $20, but needs a lithium battery that costs 25% of that price. A sales tax of 6% will be added to the cost of both items. What is the total cost of the helicopter, battery and tax? Complete the explanation.

Answer 1

The total cost of the helicopter = $26.5

The cost of lithium battery = $5.

The amount of sales tax = $1.5

Explanation:

We have been given that a radio-controlled helicopter sells for $20, but needs a lithium battery that costs 25% of that price.

We can find the price of battery by finding 25% of 20.

`\text{The cost of lithium battery}=(25)/(100)* 20`

`\text{The cost of lithium battery}=(25)/(5)`

`\text{The cost of lithium battery}=5`

Therefore, the cost of lithium battery is $5.

Now let us find the sales tax on the cost of helicopter and lithium battery.

`\text{Total sales tax}=(6)/(100)* (20+5)`

`\text{Total sales tax}=0.06* (25)`

`\text{Total sales tax}=1.5`

Therefore, the total sales tax will be $1.5.

We can find the total cost of helicopter by adding the cost of helicopter, cost of lithium battery and total amount of sales tax.

`\text{The total cost of helicopter}=20+5+1.5`

`\text{The total cost of helicopter}=26.5`

Therefore, the total cost of helicopter will be $26.5.