Half of the pillar is under the earth one third of it is under the water, and 12 feet is above the water, what is the length?

Half of the pillar is under the earth one third of it is under the water, and 12 feet is above the water, what is the length?

A 72 feet

B 80 feet

C 60 feet

D 84 feet

Solution

Correct Answer: Option A

Let, Total length =x

So,

Under the earth= x/2

Under the water=x/3

and, Above the water= 12

So,

x/2+x/3+12 =x

or, x/2+x/3-×=-12

or,-x=-72

or, x=72