Latest TCS Aptitude Question SOLUTION: Grass in lawn grows equally thick in uniform rate. It takes 24 days for 70 cows and 60 days for 30 cows to eat the whole grass. how many cows are needed to eat the grass in 96 days

• Placement Papers
• /
• TCS

TCS Question Papers: TCS Interview Experience(90) TCS Company Profile

(#M40012480) TCS question TCS ASKED Keep an EYE

Grass in lawn grows equally thick in uniform rate. It takes 24 days for 70 cows and 60 days for 30 cows to eat the whole grass. how many cows are needed to eat the grass in 96 days?

Asked In TCS Surja Ram Bhagat (11 years ago)

Unsolved Read Solution (4)

Is this Puzzle helpful?   (3)   (0) Submit Your Solution

Read Solution (4) :

shalini pasala  (11 years ago)

0 cows

g - grass at the beginning
r - rate at which grass grows, per day
y - rate at which one cow eats grass, per day
n - no of cows to eat the grass in 96 days

From given data,
g + 24*r = 70 * 24 * y ---------- A
g + 60*r = 30 * 60 * y ---------- B
g + 96*r = n * 96 * y ---------- C

Solving for (B-A),
(60 * r) - (24 * r) = (30 * 60 * y) - (70 * 24 * y)
36 * r = 120 * y ---------- D

Solving for (C-B),
(96 * r) - (60 * r) = (n * 96 * y) - (30 * 60 * y)
36 * r = (n * 96 - 30 * 60) * y
120 * y = (n * 96 - 30 * 60) * y [From D]
120 = (n * 96 - 1800)
n = 20

Hence, 20 cows are needed to eat the grass in 96 days.

Is this solution Helpfull? Yes (51) | No (2)  

garima mishra  (11 years ago)

18 cows
widthe hepl of formula
m1d1h1/w1=m2d2h2/w2

Is this solution Helpfull? Yes (4) | No (9)  

Aparna Rakate  (11 years ago)

answer: 18..is correct

Is this solution Helpfull? Yes (1) | No (2)  

TIRUMALESH  (11 years ago)

yes, APARNA u r correct.......!!!!!!!!!!!
ans is 18

Is this solution Helpfull? Yes (1) | No (3)  

Please Login to Read Solution.