Answer :
Area of trapezium = 
× (sum of parallel sides) × height
⇒ 24.5 = 
× (10 + 4) × AB
⇒ 49 = 14 × AB
⸫ AB = 
cm
⸫ Radius of the quadrant of the circle = AB = 
cm
Area of the quadrant = 
= 
= 
= 9.625 cm2
⸫ Area of the shaded region = Area of the trapezium – Area of the quadrant
= 24.5 – 9.625 cm2
= 14.875 cm2
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