Kusum buys some chocolates at the rate of Rs. 10 per chocolate. She also buys an equal number of candies at the rate of Rs. 5 per candy. She makes a 20% profit on chocolates and 8% profit on candies. At the end of the day, all chocolates and candies are sold out and her profit is Rs. 240. Find the number of chocolates purchased.
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A certain freezing process requires that room temperature be lowered from 40. c. at the rate of 5. c every hour. what will be the room temperature 10 hours after the process begins
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