28)According to the question 16*x=48 so x=3 inch so dimensions of bigger rectangle is 16 X 3.(inch)
using the theorm if scale factor a:b area is a^2:b^2
we get one side of small rectangle=12inch
since 12 * y =27 we get y=2.25 inch.
30)using the theorm if scale factor a:b area is a^2:b^2
9:1 =2.7 :x so x=0.3cm^2
32)area to students ratio in ist case=20000/200=100
area to students ratio in second case 80000/395=202.5 so yes it will be large enough.....
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