A reduction of 10% in the price of tea enables a dealer to purchase 25 kg more tea for Rs. 22500. What is the reduced price per kg of tea?
A. Rs. 70
B. Rs. 80
C. Rs. 90
D. Rs. 100
Answer: Option C
Solution(By Examveda Team)
$$\eqalign{ & {1^{st}}\,{\text{Method}}: \cr & {\text{Let}}\,{\text{the}}\,{\text{original}}\,{\text{prine}}\,{\text{of}}\,{\text{tea}}\,{\text{be}}\,{\text{Rs}}.\,x\,\text{kg} \cr & {\text{After reduction the price becomes}} \cr & = x - 10\% \,\text{of}\,x = \frac{{9x}}{{10}}\,\text{per kg} \cr & {\text{Now}}, \cr & {\frac{{22500}}{{ {\frac{{9x}}{{10}}} }}} - \frac{{22500}}{x} = 25 \cr & {\text{or}},\,22500\left[ {\frac{{10}}{{9x}} - \frac{1}{x}} \right] = 25 \cr & {\text{or}},\,25 \times 9x = 22500 \cr & {\text{or}},\,x = {\frac{{22500}}{{25\times9}}} = \text{Rs.}\,100 \cr & {\text{Hence,}}\,{\text{new}}\,{\text{price}} \cr & = 90\,{\text{per}}\,{\text{kg}}{\text{}} \cr }$$$$\eqalign{ & {\text{Thought}}\,{\text{process}}\,{\text{method:}} \cr & {\text{Let the original price be Rs}}{\text{. 100 per kg}}, \cr & {\text{He get tea}} = \frac{{22500}}{{100}} \cr & = 225\,\text{kg} \cr & {\text{After reduction the price becomes}} \cr & = {\text{ }}90{\text{ per kg}} \cr & {\text{He}}\,{\text{get}}\,{\text{tea}} = \frac{{22500}}{{90}} \cr & = 250\,\text{kg} \cr & {\text{So, reduction price is }}{\text{ Rs. }}90{\text{ per kg}} \cr & {\text{As it enables him to buy 25 kg of more tea}}{\text{.}} \cr} $$
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Comments ( 3 )
Related Questions on Profit and Loss
A. 45 : 56
B. 45 : 51
C. 47 : 56
D. 47 : 51
A. Rs. 2600
B. Rs. 2700
C. Rs. 2800
D. Rs. 3000
A. A neither losses nor gains
B. A makes a profit of 11%
C. A makes a profit of 20%
D. B loses 20%
A. Rs. 3,750
B. Rs. 3,250
C. Rs. 2,750
D. Rs. 2,250
If 10 percent= 25kg
then,, 100 percent= 250 kg,
so price of 250 kg is Rs 22500,
then price of 1kg is Rs 22500/250= 90,
so price is Rs 90/kg
Old : New = 10 : 9 (Price)
Old : New = 9 : 10 (Quantity) or 225 : 250
Now gap 25 kg
Reduced price = 22500/250 = 90
Solved by : MD. Helal uddin
Let 10% of 22500= 2250
25kg= 2250
So 1kg= 2250/25
1kg=90