Question

12. To warn ships for underwater rocks, a lighthouse
spreads a red coloured light over a sector of angle
80° to a distance of 16.5 km. Find the area of the sea
over which the ships are warned. (Use it = 3.14)
13. A round table cover has six equal designs as shown
in Fig. 12.14. If the radius of the cover is 28 cm, find
the cost of making the designs at the rate of
+0.35 per cm². (Use 3 = 1.7)

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Answer 1

Step-by-step explanation:

Radius (r) = 16.5 kmn 80° 0 80

Area over which ships are warned Area óf sector with angle 80°

89.97 km2

Answer 2

Answer:

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Step-by-step explanation:

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