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Drupady [299]
3 years ago
15

Musah stands at the centre of a rectangular field. He first takes 50 steps north, then 25 steps

Mathematics
1 answer:
blagie [28]3 years ago
6 0

Answer:

ii. 75 steps

iii. 75 steps

iv. 106 steps, and 315^{0}

Step-by-step explanation:

Let Musah's starting point be A, his waiting point after taking 50 steps northward and 25 steps westward be B, and his stopping point be C.

ii. From the second attachment, Musah's distance due west from A to C (AD) can be determined as;

bearing at B = 315^{0}, therefore <BCD = 45^{0}

To determine distance AB,

/AB/^{2} = /50/^{2}   +  /25/^{2}

          = 25000 + 625

          = 3125

AB = \sqrt{3125}

     = 55.90

AB ≅ 56 steps

Thus, AC = 50 steps + 56 steps

               = 106 steps

From ΔACD,

Sin 45^{0} = \frac{x}{106}

⇒ x = 106 × Sin 45^{0}

      = 74.9533

     ≅ 75 steps

Musah's distance west from centre to final point is 75 steps

iii. From the secon attachment, Musah's distance north, y, can be determined by;

Cos 45^{0} = \frac{y}{106}

⇒ y = 106 × Cos 45^{0}

      = 74.9533

      ≅ 75 steps

Musah's distance north from centre to final point is 75 steps.

iv. Musah's distance from centre to final point is AC = AB + BC

                                     = 50 steps + 56 steps

                                     = 106 steps

From ΔACD,

Tan θ = \frac{75}{75}

          = 1.0

θ = Tan^{-1}  1.0

 = 45^{0}

Musah's bearing from centre to final point = 45^{0} + 270^{0}

                                                           =  315^{0}

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