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Question

Which of the following statements is true?
Statement - 1: A saree $$5.5\ m$$ long and $$1.25\ m$$ wide has a zeri border $$2.5\ cm$$ broad along its length on either side. Along the width, on one edge the border was $$5\ cm$$ wide and on the other side the zari was $$25\ cm$$ wide. The area of the zaro is $$5855\ cm^{2}$$.
Statement - 2: The moon is about $$384000\ km$$ from earth and its path around the earth is nearly circular. The length of path described by moon in one complete revolution will be $$2,411,520\ km. (\pi = 3.14)$$.


A
Only Statement - 1
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B
Only Statement - 2
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C
Both Statement -1 and Statement - 2
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D
Neither Statement - 1 nor Statement - 2
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Solution

The correct option is B Only Statement - 2
Statement - 1:
Length of saree $$= 5.5\ m 5.5\times 100 = 550\ cm$$
Width of saree $$= 1.25\ m = 1.25\times 100 = 125\ cm$$
Shaded region shows zari border.
Area of zari along the length of saree
$$= 2\times 2.5\times 550 = 2750\ cm^{2}$$
Area of zari along the width of saree
$$= 120\times 5 + 120\times 25$$
$$= 600 + 3000 = 3600\ cm^{2}$$
Hence, total area covered with zari
$$= 2750 + 3600 = 6350\ cm^{2}$$
Statement - 2 : Distance of moon from earth $$= 384000\ km$$
Length of path is equal to the circumference of the circular path.
So, $$2\pi r = 2\times 3.14\times 384000\ km = 3, 411, 520\ km$$
Hence, the length of path described by moon in one complete revolution is $$2, 411,, 520\ km$$.
769998_760143_ans_fe5b7666bfb14d9a9437729dec78ccf9.jpg

Physics

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