sameersaluja wrote:

Two buildings of equal height start sinking into the ground at the same time at a uniform rate. One of the buildings will take 16 days and the other 24 days to sink completely. After how many days will the height of the portion above the ground of one of the buildings is exactly twice that of the other building?

A) 5

B) 6

C) 8

D) 10

E) 12

sinking rate of slower building=16/24, or 2/3, of faster building

when faster building has sunk 3/4, or 6/8,

slower building has sunk 4/8, or 1/2

slower building retains 1-1/2, or 1/2, above ground

faster building retains 1-3/4, or 1/4, above ground

(1/2)/(1/4)=2

let t=time

t(1/16)=3/4

t=12 days

E