A minor makes claim to a circular piece of land with a radius of 40 m from a given point, and is entitled to dig to a depth of 25 m. If the minor can dig tunnels at any angle, find the length of the longest straight tunnel that he can dig, to the nearest metre.

2 answers

draw a side view.
The diameter is 80 and the height is 25, so the diagonal is
√(80^2 + 25^2)

FYI:
a minor is a person under legal age
a miner is one who mines minerals
Haha yeah just a silly spelling mistake. sorry