Question

plz solve and give fast

Answer 1

Answer:

100 sq.cm

Step-by-step explanation:

As the perimeter of semicircle= pie r² + 2r =22 / 7 +(7)² + 2×7 = 168

As the perimeter of rectangle = 2 (l+ b) = 68

perimeter of figure = Perimeter of semicircle - Perimeter of rectangle=168 - 68= 100 sq.cm

Answer 2

Answer:

Area = 126cm²

perimeter = 12cm

Step-by-step explanation:

Area of the half circles = $\pi r^{2}$ (since 2 half circles = one ciracle)

= 22÷7 ×7²

= 154cm²

Area of the rectangle =

20cm × 14cm = 280cm²

area of the figure =

280 - 154 = 126cm²

The perimeter of the half circles =$2\pi r$

= 2 × 22 ÷ 7 × 7

= 44cm

Perimeter of the rectangle =

(2×20) + (14×2) = 68cm

Perimeter of the figure = 68cm - 44cm =

24cm