90kg of an alloy A is mixed with 140 kg of alloy B. If alloy A has lead and tin in the ratio 3:4 and alloy B has tin and copper in the ratio 2:5, then the amount of tin in the new alloy is? Options.
A) 100.6kg B) 95.4kg C) 117.5kg D) 91.4kg E) 92kg
Quantity of tin in 90kg of A = 90*4/7 = 51.4kg   Quantity of tin in 140kg of B = 140*2/7= 
<gadget id="calculator">140*2/7</gadget>
<output>40</output>
40kg   Quantity of tin in the new alloy= 51.4+40= 
<gadget id="calculator">51.4+40</gadget>
<output>91.4</output>
91.4kg   Answer is 91.4kg
<result>D</result>
90kg of an alloy A is mixed with 140 kg of alloy B. If alloy A has lead and tin in the ratio 3:4 and alloy B has tin and copper in the ratio 2:5, then the amount of tin in the new alloy is?