#### coyazayo

##### Member

- Joined
- Oct 20, 2014

- Messages
- 58

- Gender
- Male

- HSC
- 2018

1. Derive an equation expressing depth in terms of the number of hours that have elapsed since 12 noon on 19th June

2. Using the general solutions formula, find out what the earliest time on 20th June that the water will be at 12.7 m deep