The prices of tea and coffee per kg were the same in june. In july the price of coffee shot up by 20% and that of tea dropped by 20%. if in july , a mixture containing equal quantities of tea and coffee costs 40/kg. how much did a kg of coffee cost in june ?  Choose the correct choice from the following options
A) 40 B) 60 C) 80 D) 100 E) 120
Let the price of tea and coffee be x per kg in June.   Price of tea in July = 1.2x   Price of coffee in July = 0.8x .   In July the price of 1/2 kg (400gm) of tea and 1/2 kg (400gm) of coffee (equal quantities) = 40   1.2x(1/2) + 0.8x(1/2) = 40   =&gt; x =40   Thus proved...option 40.
<result>A</result>
The prices of tea and coffee per kg were the same in june. In july the price of coffee shot up by 20% and that of tea dropped by 20%. if in july , a mixture containing equal quantities of tea and coffee costs 40/kg. how much did a kg of coffee cost in june ?