Question

Please someone help me with this question

Answer 1

AB can also be -5 since its square is also 25 but distance can't be negative so the answer is 5 kilometers.

Explanation:

it is a right angled triangle.

h² = p² + b²

or, AB² = 4²+3²

or, AB²=16+9

or, AB² = 25

so, AB = 5