The cost of 3 kg of sugar is $ 60. What will the cost of 8 kg of sugar be?
Choose the correct choice:  A) 20  B) 40  C) 80  D) 160  E) 180
This is a situation of direct variation, now we solve using unitary method.   Cost of 3 kg of sugar = $ 60   Cost of 1 kg of sugar = $ 60/3= 
<gadget id="calculator">60/3</gadget>
<output>20</output>
$ 20   Cost of 8 kg of sugar= $ 20 × 8   Therefore, cost of 8 kg of sugar = $ 160   ANSWER -160
<result>D</result>
The cost of 3 kg of sugar is $ 60. What will the cost of 8 kg of sugar be?