MBA
Exam
the breadth of a rectangle decreases by 10% and then increases by 40%. by what percent should the length decrease so that the area remains the same?pl. provide sol also. 1) 23 1/13% 2) 23 28/3% 3) 24 1/13% 4) 20 40/63%
Read Solution (Total 2)
-
- 20 40/63%
If length of rectangle should decrease by x% for keeping area same, then
l*b = (l*(100-x)/100 )*b*0.9*1.4
solving it,
x= 20 40/63% - 11 years agoHelpfull: Yes(0) No(0)
- solution is 4) 20 40/63%
let x be breadth and y be length
value of x after dec. and inc. =x*(90/100)*(140/100)
=x*126/100
now area =y*x*126/100 that sud be equal to x*y
so y is decreased by 100/126
so change in y=y-y*100/126=1y*26/126
% change=(26/126)*100
20 40/63% - 11 years agoHelpfull: Yes(0) No(0)
MBA Other Question