This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

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Sh 8,400
Hili ni swali kuhusu riba rahisi (simple interest).
Kutoka kwenye swali, tunapewa: • Kiasi cha mkopo (Principal, ) = Sh 70,000 • Kiwango cha riba (Rate, ) = 12% kwa mwaka (p.a.) • Muda (Time, ) = miaka 2
a) Kokotoa riba aliyolipa kwa mwaka wa kwanza.
Step 1: Tumia fomula ya riba rahisi kwa mwaka mmoja. Fomula ya riba rahisi () ni: Kwa mwaka wa kwanza, mwaka.
Step 2: Badilisha thamani za , , na kwenye fomula.
Step 3: Fanya hesabu. Riba aliyolipa kwa mwaka wa kwanza ni:
b) Ni kiasi gani cha pesa alicholipa jumla mwishoni mwa miaka miwili?
Step 4: Kokotoa riba yote kwa miaka miwili. Kwa riba rahisi, riba kwa kila mwaka ni sawa. Kwa hivyo, riba kwa miaka miwili ni: Au, kwa kutumia fomula ya riba rahisi na :
Step 5: Kokotoa jumla ya kiasi alicholipa. Jumla ya kiasi () alicholipa ni jumla ya kiasi cha mkopo na riba yote:
Step 6: Badilisha thamani za na kwenye fomula. Jumla ya kiasi alicholipa mwishoni mwa miaka miwili ni: Last free one today — make it count tomorrow, or type /upgrade for unlimited.
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Hili ni swali kuhusu riba rahisi (simple interest).
This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.