Given total number of cows = k
Now, 1st son share = k/2
2nd son share = k/4
3rd son share = k/5
4th son share = 9
(k) + (k/4) + (k/5) + 9 = k
=> k - (19k/20) = 9
=> (20k-19k)/20 = 9
=> k = 180.
1st day the girl read = 40%
2nd day she read = 34 %
Remaining percentage of book = 100% - (40% +34%) = 26%
But given last two days she read equal number of pages
=> Each day she read 26%/2 = 13%
Last day she read 52 pages = 13%
13% = 52
1% = 4
=> 100% = 400
Total pages in the book is 400.
% Decrease in Width =
= 33.33%
By mistake = x/10
Actual value = x * 10
% Change = = 99% (negative)
Since actual value is greater than the wrong value.
Quantity X Rate = Price
1 x 1 = 1
0.7 x 1.25 = 0.875
Decrease in price = (1-0.875) x 100 = 12.5%
Physics Chemistry
Failed 35% 45%
Passed 65% 55%
Passed in both = 22% of total student
percentage of students who are passed in any of the physics or chemistry or both =(65+55) - 22 = 98%
So, the percentage of students who are failed in both = 2%
Therefore, total failed (in both subjects) students = 12
Total Items = 7
Discounted = 1
Percentage = 1/7 x 100
= 14.285%
Given 45 kg for painting
And 6% 0f 45 for wasting => 6x45/100 = 2.7 kg
Now total paint required = 45+2.7 = 47.7 kgs
But tins are available in only 4kgs
Then, no. of tins req = 47.7/4 = 11.4 => 12 tins
Given 30% of 500
Hence, 30% of Rs. 500 = Rs. 150.
and
x = 4 and y = 6
x-y = -2
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