Yobo and Adoki are keen cyclists. Yobo cycles (x - 45) km from Surulereto Sagamu in 3hours. Adoki cycles (x + 15) km from Sagamu to lfe in 7 hours. They both cycles at the same rate. Answer the following questions

1 answer

To find the speed at which both Yobo and Adoki cycle, we need to establish a relation between their distances and time.

  1. Speed of Yobo:

    • Distance: \( (x - 45) \) km
    • Time: 3 hours
    • Speed \( V_Y \) = Distance / Time = \( \frac{x - 45}{3} \) km/h
  2. Speed of Adoki:

    • Distance: \( (x + 15) \) km
    • Time: 7 hours
    • Speed \( V_A \) = Distance / Time = \( \frac{x + 15}{7} \) km/h

Since they are both cycling at the same rate, we can set their speeds equal to each other:

\[ \frac{x - 45}{3} = \frac{x + 15}{7} \]

Now, let's solve this equation for \( x \).

Cross Multiplying:

\[ 7(x - 45) = 3(x + 15) \]

Expanding Both Sides:

\[ 7x - 315 = 3x + 45 \]

Rearranging the Equation:

\[ 7x - 3x = 315 + 45 \] \[ 4x = 360 \] \[ x = 90 \]

Finding the Speeds:

Now that we have \( x \), we can find the distances and their corresponding speeds.

  1. Distance for Yobo:

    • \( x - 45 = 90 - 45 = 45 \) km
    • Speed of Yobo: \( \frac{45}{3} = 15 \) km/h
  2. Distance for Adoki:

    • \( x + 15 = 90 + 15 = 105 \) km
    • Speed of Adoki: \( \frac{105}{7} = 15 \) km/h

Thus, both Yobo and Adoki cycle at a speed of 15 km/h.

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