How to do this question plz

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth's center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Could someone . i have tried to solve myself but my calculation is off