Question

Abcd is a square of side 10cm. ad and dc are the diameter of the semicircles. ab is the radius of the quadrant

Answer 1

GETTING THE TOTAL SURFACE AREA :

1. The area of the square :


10 × 10 = 100cm ²

2. The area of the two semicircles


3.172 × (10/2)² = 6.142 × 25 = 78.55 cm²


3. The area of quadrant

3.142 × 0.25 × 10² = 78.55 cm ²

Total surface area :

Area of square + Area of semicircles + area of quadrant

100 + 78.55 + 78.55 = 257.1 cm²