Question 993434
Hi there,
Consider a right angled triangle.
Driver heading East is the base
Driver heading North is the upright.
Distance apart is the hypotenuse.
A^2 + B^2 = C^2
20^2 + 21^2 = C^2
400 + 441 = C^2
C = √(400 + 441)
C = √(841)
C = 29 miles
Hope this helps :-)