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Due to decrease of 10% in the price of tea per kg, a consumer buys 250gm of tea more than before for Rs. 270. What is the original price of tea ?
- A130/kg
- B120/kg
- C115/kg
- D140/kg
Answer not set
Discussion 1
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Solution
Let the original price of tea be a Rs per kg and original weight of tea bought by consumer be b kg
a x b = 270 ( let this equation be 1)
Now due to decrease in price by 10 percent the new prices become 0.9 times the original and as a result consumption increases by 0.25 kg without spending any extra money .
So, 0.9a x (b+0.25) = 270 (let this equation be 2)
From equation 1 and 2
0.9ab + 0.225a = 270
0.225a = 270 - 243
a = 120/kg
Let the original price of tea be a Rs per kg and original weight of tea bought by consumer be b kg
a x b = 270 ( let this equation be 1)
Now due to decrease in price by 10 percent the new prices become 0.9 times the original and as a result consumption increases by 0.25 kg without spending any extra money .
So, 0.9a x (b+0.25) = 270 (let this equation be 2)
From equation 1 and 2
0.9ab + 0.225a = 270
0.225a = 270 - 243
a = 120/kg