A cable car travels 2236 m to climb a mountain that is 1000 m high. It then travels 1414 m to descend 1000 m on the other side of the mountain. A tunnel goes straight through the mountain, from the...

A cable car travels 2236 m to climb a
mountain that is 1000 m high. It then
travels 1414 m to descend 1000 m on the
other side of the mountain. A tunnel goes
straight through the mountain, from the
starting point to the endpoint of the cable
car’s journey. How long is the tunnel?