Answer:
The shadow cast by a 28-foot tree is 8.4 foot.
Step-by-step explanation:
The rule of three is a way of solving problems of proportionality between three known values and one unknown, establishing a relationship of proportionality between all of them. In the case of direct proportionality, when one magnitude increases, the other increases ( or if one magnitude decreases, the other will also decrease)
This is an example of application of this rule:
40 foot tree ⇒ 12 foot shadow
28 foot tree ⇒ x foot shadow
Then, to solve and calculate the value of x, which is the value of the shadow cast by the 28-foot tree, perform the count:
x=[tex]\frac{28*12}{40}[/tex]
x=[tex]\frac{336}{40}[/tex]
x=8.4
This means that the shadow cast by a 28-foot tree is 8.4 foot.
