How is continental crust different from oceanic crust?

oceanic crust is thicker and more dense.

continental crust is more dense and lighter.

oceanic crust is thinner and more likely to sink.

continental crust is thicker and more likely to sink.

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?