# Crossroads

A passenger car and an ambulance come to the rectangular crossroad, and the ambulance leaves. Passenger car at speed 39 km/h and ambulance at 41 km/h.

Calculate the relative speed of the ambulance moving to the car.

Calculate the relative speed of the ambulance moving to the car.

## Correct answer:

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Our vector sum calculator can add two vectors given by their magnitudes and by included angle.

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Do you want to convert velocity (speed) units?

See also our right triangle calculator.

See also our trigonometric triangle calculator.

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

**geometry**- vector
**algebra**- expression of a variable from the formula
**arithmetic**- square root
- square (second power, quadratic)
- absolute value
**planimetrics**- Pythagorean theorem
- right triangle
- triangle

### Units of physical quantities:

#### Themes, topics:

### Grade of the word problem:

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