Question

Jack was planting a tree. He was to dig a hole that was 3 feet deep for every 5 feet of tree height. How deep should he dig the hole for a tree that is 17 feet high

Answer 1

Jack was planting a tree. He was to dig a hole that was 3 feet deep for every 5 feet of tree height. How deep should he dig the hole for a tree that is 17feet high. 

Calculations 

$\frac{DEEP}{HIEGHT}$ 

Cross multiplication

$\frac{3 DEEP}{5 HIEGHT}$ = $\frac{x}{13}$ 

5x = 2 x 13 

Divide by 5 to isolate x

$\frac{5x}{5}$ = $\frac{51}{5}$ 

x = 10.2 

Answer = 10.2 

Answer 2

5/3=1.66666... so thats the ratio so 17/ 1.6666666... would equal 10.2 which is your answer.