Question

A man goes 30km due north and then 40km due east.How far away is he from his initial position?

Answer 1

8.36km


from its position
.....

Answer 2

h² = b²+p²

here b=30 and p = 40

so,  h² = 30² +40²

h² = 900+1600

h² = 2500

h² = 50²

so  h = 50

hope it helps you