How many kgs of flour worth 25 per kg must be blended with 30 kgs of flour worth ` 30 per kg so that by selling the blended variety at X 30 per kg there should be a gain of 10%?	Pick
A) 32 kg	B) 40 kg	C) 36 kg	D) 42 kg	E) None of these
(x * 25) + (30 * 30) / (x + 30)   = 11/10 * 30(x + 30)   On solving the equation, x = 36.   Answer:36 kg
<result>C</result>
How many kgs of flour worth 25 per kg must be blended with 30 kgs of flour worth ` 30 per kg so that by selling the blended variety at X 30 per kg there should be a gain of 10%?