HOW MANY KGS OF TEA WORTH RS.25/KG MUST BE BLENDED WITH 30 KGS OF TEA WORTH RS.30/KG SO THAT BY SELLING THE BLENDED VARIETY AT RS.30/KG THERE SHOULD BE A GAIN OF 10%
Options
A) 36  B) 40  C) 32  D) 42  E) 45
Let the weight of tea(25 per kg) to be used - X   The total cost of the blend - total cost of 25 RS tea + total cost of 30 RS tea   - 25X + 900 ( as the total weight of 30 RS tea is already given i.e 30)   total weight of the blend = X + 30 ( which should be sold per 30 RS and result in 10% profit)   The equation follows like this   25X + 900 + (10 % of (25X + 900)) = 30( X + 30)   25X + 900 +2.5 X + 90 = 30 X + 900   27.5 X + 990 = 30 X + 900   2.5 X = 90   X= 90/2.5= 
<gadget id="calculator">90/2.5</gadget>
<output>36</output>
36   36NSWER:36
<result>A</result>
HOW MANY KGS OF TEA WORTH RS.25/KG MUST BE BLENDED WITH 30 KGS OF TEA WORTH RS.30/KG SO THAT BY SELLING THE BLENDED VARIETY AT RS.30/KG THERE SHOULD BE A GAIN OF 10%