In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: the volume of a certain substance is always directly proportional to its weight . if 48 cubic inches of the substance weigh 112 ounces , what is the volume , in cubic inches , of 56 ounces of this substance ?
Options: a ) 27 , b ) 36 , c ) 42 , d ) 24 , e ) 147
[EX A]: d

[EX Q]: Problem: rectangular tile each of size 20 cm by 30 cm must be laid horizontally on a rectangular floor of size 100 cm by 150 cm , such that the tiles do not overlap and they are placed with edges jutting against each other on all edges . a tile can be placed in any orientation so long as its edges are parallel to the edges of floor . no tile should overshoot any edge of the floor . the maximum number of tiles that can be accommodated on the floor is :
Options: a ) 40 , b ) 15 , c ) 25 , d ) 32 , e ) 45
[EX A]: c

[EX Q]: Problem: obra drove 180 meters along a circular track . if the area enclosed by the circular track on which she drove is 57,600 square meters , what percentage of the circular track did obra drive ?
Options: a ) 37.5 % , b ) 12.5 % , c ) 18.75 % , d ) 25 % , e ) 33.3 %
[EX A]:
a