a body displaced 12m due to east then 5m due to north then 9m vertically upward what is the resultant displacement?

Answer 1

sqrt (12^2 + 5^2) = sqrt(144+25) = 13
sqrt (13^2 + 9^2) = (sqrt(169+81) = sqrt(250) = 5 sqrt(10)

Answer 2

or: sqrt(12^2 + 5^2 + 9^2) = sqrt 250
since all three displacements are mutually perpendicular

(Same answer as damon)

Answer 3

Pizz give me correct answer