Question

Find area of the shaded region in the following
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Answer 1

(v) area of one rectangle = l×b = 64 × 2.5 = 160 + 230

area of another rectangle = 115×2 = 230

= 390m²

(iii) formula of semicircle = 1/2πr² ( Radius = 7 = 14/2)

= 1/2 × 22/7 × 14/2 × 14/2

= 1×22×14×14/2×7×2×2

= 4312/56

= 77cm²

= 77 ×2 = 154 cm²

area of square= s²

= 14×14

=196

shaded area = larger area - area of smaller area

= 196 - 154

= 42 cm²

hence the answer = 42cm²

other problems I can't understand sorry