how many litres of pure acid are there in 15 litres of a 20 % solution  Choose the correct choice:  A) 4  B) 5  C) 2  D) 3  E) 1
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 15</gadget>
<output>3</output>

<result>D</result>
how many litres of pure acid are there in 15 litres of a 20 % solution
multiply(divide(20, const_100), 15)
explanation : question of this type looks a bit typical , but it is too simple , as below . . . it will be 15 * 20 / 100 = 3 answer : option d