There are 5 boxes in a cargo. The weight of the 1st box is 200 KG, the weight of the 2nd box is 20% higher than the third box, whose weight is 25% higher than the 1st box weight. The 4th box which weighs 350 KG is 30% lighter than the 5th box. Find the difference in average weight of the 4 heaviest boxes and the four lightest boxes. Select.
A) 22 B) 75 C) 25 D) 70 E) 11
weight of 1st box=200   weight of 3rd box=(125/100)*200= 
<gadget id="calculator">(125/100)*200</gadget>
<output>250</output>
250   weight of 2nd box=(120/100)*250= 
<gadget id="calculator">(120/100)*250</gadget>
<output>300</output>
300   weight of 4th box=350   weight of 5th box=(10/7)*350= 
<gadget id="calculator">(10/7)*350</gadget>
<output>500</output>
500   average of 4 highest weighted boxes=(500+350+300+250)/4= 
<gadget id="calculator">(500+350+300+250)/4</gadget>
<output>350</output>
350   average of 4 lightest boxes=(350+300+250+200)/4= 
<gadget id="calculator">(350+300+250+200)/4</gadget>
<output>275</output>
275   therefore difference=350-275= 
<gadget id="calculator">350-275</gadget>
<output>75</output>
75   Answer:75
<result>B</result>
There are 5 boxes in a cargo. The weight of the 1st box is 200 KG, the weight of the 2nd box is 20% higher than the third box, whose weight is 25% higher than the 1st box weight. The 4th box which weighs 350 KG is 30% lighter than the 5th box. Find the difference in average weight of the 4 heaviest boxes and the four lightest boxes.