Find the area of shaded portion ? (PART-4

Find the area of shaded portion ?(PART-1)
https://youtu.be/Xrt5XJpwJyc

Find the area of shaded portion ?(PART-2)
https://youtu.be/cjEDy44Orj0

Find the area of shaded portion ? (PART-3)
https://youtu.be/r_tJ3V9fJ6k

Find the area of shaded portion ? (PART-4
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People & Blogs	Upload TimePublished on 23 Jan 2018