In a grass field, If there are 40 cows, they could eat for
40 days. If there are 30 cows, they could eat for 60 days.
Than if 20 cows, How much day they could eat?
a) 60 b) 80 c)55 d)50
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Answer / tam
the ratio is coming
1:1
1:2
1:4........
so the ans is 80
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / praveen
let c be the quantity eaten by each cow per one day...
let g be the grass quantity...
then from the first statemet 40*(c)*40=g
then c = g/(1600)
now consider 20 cows...each day they will take 20*(c)grass
i.e., 20*(g/1600)=g/80...
=> each day they complete g/80th part.
therefore they can complete in 80 days...
now come to the second statement...
for 30 cows...30(g/1600)...t.e., they can complete in
160/3 days ...so second statement is wrong...
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / vishal pitaliya
as the no cows are decreasing no of days will increase
so ans would be 80
40--40
30--60
20--80 (b)ans
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / surya teja challapalli
No of days is inversely proportional to no of cows.
Here no of cows is decresing by 10,no of days increasing by
20.
40->40
30->60
20->80
No of days taken by 20 cows to eat the grass=80.
| Is This Answer Correct ? | 2 Yes | 1 No |
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