If 5 gallons of gasoline are added to a tank that is already filled to 3/4 of its capacity, the tank is then filled to 9/10 of its capacity. How many gallons does the tank hold?	Select:	A) 20	B) 30	C) 36	D) 40	E) 60
Let the Capacity of the tank=C   (3/4)C + 5 = (9/10)C   =&gt;(9/10)C - (3/4)C = 5   =&gt;(3/20)C = 5   =&gt;C = (5*20)/3 = 33.33   Number of gallons of gasoline that the tank currently holds = 3/4*C +5 = 24.99+5= 
<gadget id="calculator">24.99+5</gadget>
<output>29.99</output>
29.99=30   Answer 30
<result>B</result>
If 5 gallons of gasoline are added to a tank that is already filled to 3/4 of its capacity, the tank is then filled to 9/10 of its capacity. How many gallons does the tank hold?