Question

five yam tubers and 70 banana cost 8naira.70kobo if the banana cost 7 for 12k find the cost of one yam

Answer 1

To find the cost of one yam, let's first break down the information given in the problem.

1. **Cost of Bananas**: We know that 7 bananas cost 12 kobo.
- Therefore, the cost of 1 banana = \(\frac{12 \text{ kobo}}{7} \approx 1.714 \text{ kobo}\).

2. **Total Cost in Naira and Kobo**: The total cost for 5 yam tubers and 70 bananas is 8 naira and 70 kobo, which can be converted to kobo for easier calculations:
- 8 naira = 800 kobo, so 8 naira 70 kobo = 800 kobo + 70 kobo = 870 kobo.

3. **Cost of 70 Bananas**: Now we need to find the cost of 70 bananas:
- Cost of 70 bananas = \(70 \times \frac{12 \text{ kobo}}{7} = 70 \times \frac{12}{7} = 120 \text{ kobo}\).

4. **Cost Breakdown**:
- Let the cost of one yam tuber be \(y\) kobo.
- The total cost of 5 yam tubers is \(5y\) kobo.

Therefore, the total cost equation can be set up as:
\[
5y + 120 = 870
\]

5. **Solving for \(y\)**:
\[
5y = 870 - 120
\]
\[
5y = 750
\]
\[
y = \frac{750}{5} = 150
\]

Thus, the cost of one yam tuber is **150 kobo** or **1 naira 50 kobo**.