Question

5 an aircraft is at a height of 3500 m above sea level. at the same point, a submarine is at a depth of 1000 m below sea level. what is the vertical distance (in meters) between the aircraft and the submarine?
note: assume that the distance above the sea level is positive and below the sea level is negative.
a 1000
b 2500
c 3500
d 4500

Explanation:

Step1: Assign signed values

Aircraft height: $3500$ m, Submarine depth: $-1000$ m

Step2: Calculate vertical distance

Vertical distance = $3500 - (-1000) = 3500 + 1000$

Answer:

D. 4500