Question

A person wearing contact lenses is told to wear them for 3 hours on the first day and for 1/2 hour longer on each succeeding day. For how many hours will the person wear the contact lenses on the 10th day?

Answer 1

On the 10th day, the person will wear 8 hours

Explanation:

• Step 1: Given the person wears contact lenses for 3 hours on the 1st day and 0.5 hours every succeeding day. Form an equation for this.

Number of hours that the person wears contact lenses = 3 + 0.5 × n, where n is the respective succeeding day

⇒ Number of hours on the 10th day = 3 + 0.5 × 10 = 3 + 5 = 8