1. A spider hung from the ceiling at the end of a long silken thread. Hanging there, touching the floor, he was just 145 cm from the nearest wall. But then he started swinging, getting ever nearer to that wall, until at last he touched it at a point 29 cm up from the floor. How high was the ceiling?

Ceiling 377 cm high

Ceiling 420 cm high

Ceiling 298 cm high