A fuel dealer paid KSh 1,500 per barrel import of petroleum and was charged 25% excise duty on top of every barrel bought. Work out the amount of money the dealer paid for 1000 barrels of petroleum bought that month.

Ushuru ni 25% ya gharama ya pipa moja.

$$\text{Ushuru kwa pipa} = 25\% \times \text{Ksh } 16,500$$ $$\text{Ushuru kwa pipa} = \frac{25}{100} \times 16,500$$ $$\text{Ushuru kwa pipa} = \text{Ksh } 4,125$$

Jumla ya gharama kwa pipa = Gharama ya awali + Ushuru

$$\text{Jumla ya gharama kwa pipa} = \text{Ksh } 16,500 + \text{Ksh } 4,125$$ $$\text{Jumla ya gharama kwa pipa} = \text{Ksh } 20,625$$

Jumla ya gharama kwa mapipa 1000 = Jumla ya gharama kwa pipa $\times$ Idadi ya mapipa

$$\text{Jumla ya gharama kwa mapipa 1000} = \text{Ksh } 20,625 \times 1,000$$ $$\text{Jumla ya gharama kwa mapipa 1000} = \text{Ksh } 20,625,000$$

Jumla ya kiasi cha pesa muuzaji alilipa kwa mapipa 1000 ya petroli ni:

$$\text{Ksh } 20,625,000$$