Question

A tortoise is walking in the desert. It walks at a speed of 7 meters per minute for 17.5 meters. For how many minutes does it walk?

Answer 1

a tortoise can walk 7 m in 1 min.
so it can walk 1 m in 1 /7 min.
so to walk 17.5 m it must has walked 17.5 /7 mins.
=2.5 mins.