# The tower

The observer sees the tower's base 96 meters high at a depth of 30 degrees and 10 minutes and the top of the tower at a depth of 20 degrees and 50 minutes. How high is the observer above the horizontal plane on which the tower stands?

## Correct answer:

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Try conversion angle units angle degrees, minutes, seconds, radians, grads.

Do you have a system of equations and are looking for calculator system of linear equations?

See also our right triangle calculator.

See also our trigonometric triangle calculator.

Try conversion angle units angle degrees, minutes, seconds, radians, grads.

### You need to know the following knowledge to solve this word math problem:

**algebra**- system of equations
- expression of a variable from the formula
**planimetrics**- right triangle
- triangle
**basic functions**- ratio
**goniometry and trigonometry**- tangent

### Units of physical quantities:

### Grade of the word problem:

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