plz help me with this question

Mathematics
Tutor: None Selected Time limit: 1 Day

john works for 12 weeks for 7.50 an hour, he spends 20 a week on lunch. how many hours will he have to work to buy a 210 class ring?

Nov 3rd, 2014

Considering that he's working 5 days a week, and he needs to work x hours per day.

12 * x * 5 * 7.5  - 20 * 12 = 210 

450 x  - 240 = 210

450 x = 450

x = 1;

He needs to work 1 hour per day for 12 weeks.

Nov 3rd, 2014

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