Question

An airplane landed at a point 100 km east and 420 km south from where it took off. If the airplane flew in a straight line from where it took off to where it lands, how many kilometers did it fly? Enter only the number rounded to the nearest kilometer.

Answer 1

`√(100^2 + 420^2)`

`√(100^2+420^2)=20√(466)\quad \left(\mathrm{Decimal:\quad }\:431.74066\dots \right)`

Explanation: