I have an image of the problem

Find the area of the circle:

Area = 3.14 x 12^2 = 3.24x144 = 452.16 cm^2

The sector is 60 degrees.

Multiply the area of the circle by the fraction of the sector:

452.16 x 60/360 = 75.36 cm^2

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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