A shopkeeper charges sales tax of X% up to Rs 2000 and above it he cha...
Solution:
Let the tax percentage below and above Rs. 2000 be x% and y% respectively.
Let the value of the goods purchased be M.
Let the amount of tax paid on M be T.
Let the amount of tax paid on Rs. 2000 be P.
Let the amount of tax paid on Rs. 10000 (i.e., Rs. 8000 above Rs. 2000) be Q.
Then, we have
Mx/100 + (M - 2000)y/100 = T ----- (1)
2000x/100 + P = T ----- (2)
8000y/100 + Q = T ----- (3)
Subtracting (2) from (1), we get
(M - 2000)y/100 - 2000x/100 = 0
(M - 2000)y = 2000x ----- (4)
Subtracting (2) from (3), we get
8000y/100 - 2000x/100 = 360
40y - 10x = 18 ----- (5)
Multiplying (4) by 10, we get
(M - 2000)10y = 20000x
Dividing by 2000 and substituting in (5), we get
40y - (M - 2000)y/100 = 18 ----- (6)
Substituting M = 6000 and T = 320 in (1), we get
6000x/100 + 4000y/100 = 320
60x + 40y = 32 ----- (7)
Substituting M = 12000 and T = 680 in (1), we get
12000x/100 + 10000y/100 = 680
120x + 100y = 68 ----- (8)
Multiplying (7) by 5, we get
300x + 200y = 160 ----- (9)
Subtracting (9) from (8), we get
-180x - 300y = -92
Multiplying by -1/3, we get
60x + 100y = 92/3 ----- (10)
Adding (6) and (10), we get
140y = 154/3
y = 11/3
Substituting in (10), we get
60x + 100(11/3) = 92/3
60x = 2/3
x = 1/30
Therefore, (X - Y) = (1/30 - 11/300) = 1/150.
Hence, the value of (X - Y) is 1/150.
A shopkeeper charges sales tax of X% up to Rs 2000 and above it he cha...
SOLUTION :--
Tax on Rs 2000 = X%
Tax on Above 2000 = Y% (GIVEN)
ATQ:
2000 × X% + (remaining) 4000 × Y% = 320 [1st Case]
2000 × X/100 + 4000 × Y/100 = 320
20x + 40y = 320 [Equation 1]
Again,
2000 × X% + (remaining) 10000 × Y % = 680 [2nd Case]
2000 × X/100 + 10000 × Y/100 = 680
20x + 100y = 680 [Equation 2]
Now,
Subtracting Equation 2 from 1...
20x + 40y = 320
20x + 100y = 680
-60y = -360
Y = 6
Now, putting the value of (Y = 6) in Equation 1 we, get...
20x + 40y = 320
20x + 40×6 = 320
20x = 320-240
X = 80/20
X = 4
Now we have the value of both X and Y where (X = 4) & (Y = 6), so we can easily find (X - Y) = ( 4 - 6) i.e = -2
Hence, (X - Y) = -2 (ans)...
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