Question

A miner is working at 343 metres below ground level. The minerthen moves 86 metres up toward the surface. What is the miner'sposition after the move, relative to ground level?

Answer 1

The miner is locate 343 meters below ground level. So it will be a negative integer.

-343

The miner moves 86 meters up, since it is going up, the sign is positive.

The miner's position will be :

-343 + 86 = -257

So the answer is 257 meters below the ground level