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Verified Answer :

use the formula for finding the area of a semi circle pi r^2
the radius is half the diameter, the diameter is given because a rectangle has 2 pairs of equal sides

1) pi
2.5^2=pi 6.25

2) pi
7^2= pi* 49

area rectangle=70cmsq
area small hemisphere=235.5cmsq
area big hemisphere=1846.32cmsq
adding all
2151.82 cmsq