Question

A tree casts a shadow 10 ft long. A boy standing next to the tree casts a shadow 2.5 ft long. The triangle shown for the tree and its shadow is similar to the triangle shown for the boy and his shadow. If the boy is 5 ft tall, how tall is the tree?

Answer 1

h/10 = 5/2.5
h = 20

Answer 2

×/10=5/4
4/4=50/4
×=12 4/54