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एक प्रक्षेप्य का क्षैतिज परास उसकी अधकतम प्राप्त ऊंचाई का चार गुना है सेइटज से इसका प्रक्षेपण कोण है ---
A. `30^@`
B. `60^@`
C. `45^@`
D. `90^@`

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Correct Answer - C
अनुच्छेद 5.7 के बिंदु (5) से, `theta=tan^-1[4/n],` यहां n = 4

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