Question

Sarah went hiking on Mt. Edwards. On monday she started at an elevation of 27 meters below sea level. On tuesday she went 10 meters up then descended 3 meters. What is nancus elevatoin at the end of the day on tuesday

Answer 1

20 meters below sea level

Explanation:

The sea level is Reference point, any point below the sea level will be negative and any point above the sea level will be a positive

She started at 27 meters below sea level on Monday =-27 meters

Tuesday she went up 10 meters from -27=-27+10=-17, 17 meters below sea level. She also descended 3 meters below -17 m=-17-3= -20 meters

Final position on Tuesday= -20 meter or 20 meters below sea level