Question

In a workshop a brooch is made with silver wire in the form of a circle with diameter 35 mm. The wire is also used in making 5 diameters which divide the circle into 10 equal sectors as shown in figure. Find: a) What is the radius of circle i) 5/2 mm ii) 35/ 2 mm iii) 35 mm iv) 10 mm b) What is the circumference of brooch? i) 100 mm ii) 110 mm iii) 35 mm iv) 50 mm c) What is the total length of silver wire required? i) 528 mm ii) 825mm iii) 285 mm iv) 852mm d) What is the area of each sector of the brooch? i) 385 mm2 ii) 358/ 4 mm2 iii) 585/4mm2 iv) 385/4 mm2 e) The given problem is based on which mathematical concept i) Area related to circle ii) Circles iii) Constructions iv) none of these

Answer 1

Answer:

(b) The curved surface area of the drop is

(i) 8.74 mm³ (ii) 9.12 mm³ (iii) 10.68 mm³ (iv) 12.54 mm³