Quantitative Aptitude :: Volume and Surface Area - Discussion

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Explanation:
volume=l*b*h=6*5*2=60cm^3
now volume is reduced by 19%.therefore 81/100 *60=48.6
now,thickness remains same and let length and breadth be reduced by x%
so,new volume: 2*x/100 *6*x/100 *5=48.6
=>x=90 thus length and width is reduced by 90%
new width =90% of 5 =4.5