Latest Wipro Aptitude Question SOLUTION: On a certain pasture the grass grows at an even rate. It knows that 40 cows can graze on it for 40 days before the grass is exhausted, but 30 cows can graze there as long as 60 day

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(#M40137106) WIPRO Numerical Ability question verbal Keep an EYE

On a certain pasture the grass grows at an even rate. It knows that 40 cows can graze on it for 40
days before the grass is exhausted, but 30 cows can graze there as long as 60 days. How many would
the pasture last if 20 Cows were to graze on it?

Asked In Wipro VINOD (9 years ago)

Unsolved Read Solution (9)

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Read Solution (9) :

ashwani kumar shahi  (9 years ago)

40 cows-40 days
30 cows-60 days
.......
.........
.........
20 cows- 80 days

Is this solution Helpfull? Yes (2) | No (4)  

Juhi  (9 years ago)

is question from this site is repeated..??

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yadavelli uday  (9 years ago)

In 40 days the pasture provides 1600 feeds and in 60 days 1800 feeds. Thus 20 days growth on the pasture allows for 200 extra feeds or, alternatively, enough grass grows everyday to feed ten cows. Consequently, the quantity of grass on the pasture before the cows start grazing is enough for (1600-40x10) or (1800-60x10) i.e. 1200 feeds. We have already seen that the daily growth is adequate to feed 10 cows endlessly. So, out of 20 cows the remaining 10 would take 120 days to consume the 1200 feeds that already exist on the pasture. Hence, the pasture would last 120 days if 20 cows were to graze on it.

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Srinivas Rao  (9 years ago)

In 40 days the pasture provides 1600 feeds and in 60 days 1800 feeds.
Thus 20 days growth on the pasture allows for 200 extra feeds or, alternatively, enough grass grows everyday to feed ten cows.
Consequently, the quantity of grass on the pasture before the cows start grazing is enough for (1600-40x10) or (1800-60x10) i.e. 1200 feeds.
We have already seen that the daily growth is adequate to feed 10 cows endlessly.
So, out of 20 cows the remaining 10 would take 120 days to consume the 1200 feeds that already exist on the pasture.
Hence, the pasture would last 120 days if 20 cows were to graze on it.

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thapasya  (9 years ago)

for 40 cows it takes 40 days to finish one work(grazing the whole pasture.)
for 30 it takes 60 days to finish
from the pattern, for every -10 cows the day increase by 20 more days.
hence 30-20 cows graze in 60 +20 days i.e. 80 days.

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Manikanta.P.S  (9 years ago)

40*1=40
30*2=60
20*3=60

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Ashish  (9 years ago)

40*40=1600
30





















40*40=1600
30*60=1800
both diff=200
20->200
10day
1600-400=1200
1800-600=1200
then 1200/10=120day






8

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himanshi tayal  (9 years ago)

84
40 cows eats in -40 days
1 cow eats in - 1/40 days
30 cows eats in -60 days
1 cow eats in 1/60 days
(30+40 cows)eats in 1/40+1/60=1/24
1 cow eats in-1/70
=1/70*1/24*20
=1/84
=84

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sreekeerthi  (5 years ago)

40*40=1600
30*60=1800
1800-1600=200
1800+200=2000
20*x=2000
x=2000/20=100

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