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 70 / kg. how much did a kg of coffee cost in june?  Pick one:
A) 70  B) 60  C) 80  D) 100  E) 120
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(1/5) + 1</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(4/5) * (6/5)</gadget>
<output>24/25 = around 0.96</output>

<gadget id="calculator">70 / (24/25)</gadget>
<output>875/12 = around 72.916667</output>

<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 70 / kg. how much did a kg of coffee cost in june?
divide(70, multiply(subtract(const_1, divide(20, const_100)), add(divide(20, const_100), const_1)))
"let the price of tea and coffee be x per kg in june . price of tea in july = 1.2 x price of coffee in july = 0.8 x . in july the price of 1 / 2 kg ( 700 gm ) of tea and 1 / 2 kg ( 700 gm ) of coffee ( equal quantities ) = 70 1.2 x ( 1 / 2 ) + 0.8 x ( 1 / 2 ) = 70 = > x = 70 thus proved . . . option a ."