Question

Find distance between enemy and radar. enemy=2×10^-4. and speed of radar =3×10^8 m/s

Answer 1

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Distance to travel = 2×10⁴ m

Speed of radar = 3×10⁸ m/s

Time taken to reach enemy ship = Distance / Time

                                                         = 2×10⁴ / 3×10⁸

                                                         = 2/3 × 10⁻⁴ s

Time taken to reach back =  2/3 × 10⁻⁴ s

Therefore total time taken = 2/3 × 10⁻⁴  + 2/3 × 10⁻⁴

                                              = 4/3 × 10⁻⁴ s

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