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 diagonals of a rhombus are 10 cm and 15 cm . find its area ?
Options: a ) 75 , b ) 129 , c ) 150 , d ) 123 , e ) 117
[EX A]: a

[EX Q]: Problem: a rectangular wall is covered entirely with two kinds of decorative tiles : regular and jumbo . 1 / 3 of the tiles are jumbo tiles , which have a length three times that of regular tiles and have the same ratio of length to width as the regular tiles . if regular tiles cover 60 square feet of the wall , and no tiles overlap , what is the area of the entire wall ?
Options: ['a ) 160', 'b ) 240', 'c ) 330', 'd ) 440', 'e ) 560']
[EX A]: c

[EX Q]: Problem: a cube of edge 5 cm is immersed completely in a rectangular vessel containing water . if the dimensions of the base of vessel are 10 cm * 5 cm , find the rise in water level ?
Options: a ) 2.5 cm , b ) 3.6 cm , c ) 5 cm , d ) 6.43 cm , e ) 7.56 cm
[EX A]:
a