An electric pole, 14 metres high, casts a shadow of 10 metres. Find the height of a tree that casts a shadow of 15 metres under similar conditions.
Choices
A) 21  B) 22  C) 20  D) 23  E) 24
direct proportion x1/y1=x2/y2   14/10=15/x   (14/10) 15=x   21 = x   21nswer:21
<result>A</result>
An electric pole, 14 metres high, casts a shadow of 10 metres. Find the height of a tree that casts a shadow of 15 metres under similar conditions.