(b) (i)

Hawa walked two fifth of her journey, John walked three eighth of his journey. If these two people have the same length of their journey, who walked the shortest distance?

1 answer

To determine who walked the shortest distance, we first need to express the distances Hawa and John walked in a comparable way based on the lengths of their journeys.

Let the total length of Hawa's journey be represented as \( H \) and the total length of John's journey as \( J \).

According to the problem:

  • Hawa walked \( \frac{2}{5}H \)
  • John walked \( \frac{3}{8}J \)

Since they have the same length of their journeys, we can set \( H = J \).

Step 1: Use \( H = J \)

Let’s denote the journey length as \( D \) (where \( D = H = J \)). Hence:

  • Hawa walked \( \frac{2}{5}D \)
  • John walked \( \frac{3}{8}D \)

Step 2: Compare the distances walked

Now we calculate the distances Hawa and John walked in terms of \( D \):

  1. Hawa's Distance: \[ \text{Distance Hawa walked} = \frac{2}{5}D \]

  2. John's Distance: \[ \text{Distance John walked} = \frac{3}{8}D \]

Step 3: Find a common denominator to compare

To compare \( \frac{2}{5}D \) and \( \frac{3}{8}D \), we can find a common denominator. The least common multiple of 5 and 8 is 40.

Converting each fraction:

  • For Hawa: \[ \frac{2}{5}D = \frac{2 \times 8}{5 \times 8}D = \frac{16}{40}D \]

  • For John: \[ \frac{3}{8}D = \frac{3 \times 5}{8 \times 5}D = \frac{15}{40}D \]

Step 4: Compare the two distances

Now we can compare:

  • Hawa's distance: \( \frac{16}{40}D \)
  • John's distance: \( \frac{15}{40}D \)

Since \( \frac{16}{40}D > \frac{15}{40}D \), we find that:

  • Hawa walked more distance than John.

Conclusion

Thus, John walked the shortest distance.