Question

secutive ribs of the umbrella
car has two wipers which do not overlap. Each
wiper has a blade of length 25 cm sweeping through
angle of 115. Find the total area cleaned at each
sweep of the blades
To warn ships for underwater rocks, a lighthouse
preads a red coloured light over a sector of angle
30 to a distance of 16.5 km. Find the area of the sea
hver which the ships are wamed. Use I = 3.14
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
70.35 per cm. (Use 13 = 1.7)
Tick the correct answer in the following:
Fig. 12:14
Area of a sector of angle p (in degrees) of a circle with radius Ris
2x22​

Answer 1

Answer:

Step-by-step explanation:

Radius = 25 cm

sweeping angle=115 degrees

total area by 2 wipers = 2* area cleaned by 1 wiper

                                    = 2*0/360 degrees*pir sq

                                   =158125/126 cm sq