If a 40 -foot tree casts a 12 -foot shadow, find the length of the shadow cast by a 21-foot tree.

Question

Emery Franklin

Mathematics

3 March, 02:24

If a 40 -foot tree casts a 12 -foot shadow, find the length of the shadow cast by a 21-foot tree.

+2

Answers (2)

Know the Answer?

Jordin Stout · Answer 1

The shadow Would be About 6.3 feet

Yair Mosley · Answer 2

Ratio and proportaion

assuming the shadow to the actual height is constant

shadow:actual height=12ft:40ft=12/40=3/10=3ft:10ft

so

3ft:10ft=?:21ft

solve

3ft/10ft=?/21ft

times both sides by 21ft

63ft/10=?

6.3ft=?

the shadow is 6.3ft