Value of an item after adding a percentage customs duty
Rs 9,760
💡 What it's asking: Duty is extra money added on top of the price. We find 22% of the value and add it on.
- Find 22% of 8000: 8000 × 22 ÷ 100 = 1760.
- Add it to the original value: 8000 + 1760 = 9760.
- So the value after duty is Rs 9760.
✅ The answer should be a bit more than Rs 8000 (about one fifth more), and 9760 is.
සිංහලෙන් විසඳුම
තීරු බද්ද යනු මිලට උඩින් එකතු වන අමතර මුදලකි. වටිනාකමෙන් 22% සොයා එය එකතු කරමු.
- 8000 න් 22% සොයන්න: 8000 × 22 ÷ 100 = 1760.
- එය මුල් වටිනාකමට එකතු කරන්න: 8000 + 1760 = 9760.
- එබැවින් බද්දෙන් පසු වටිනාකම රු. 9760.
Use isosceles triangle base angles and angle sum
x = 36°
💡 What it's asking: The triangle has two equal sides, so its two base angles are equal. All three angles together make 180°.
- Both base angles are 2x because the equal sides face them.
- Add all angles: x + 2x + 2x = 5x.
- Set 5x = 180° and divide by 5: x = 36°.
✅ 36° + 72° + 72° = 180°, so it works.
සිංහලෙන් විසඳුම
ත්රිකෝණයේ පාද දෙකක් සමාන නිසා ආධාරක කෝණ දෙකත් සමානයි. කෝණ තුනේ එකතුව 180° කි.
- සමාන පාදවලට ඉදිරියෙන් ඇති නිසා ආධාරක කෝණ දෙකම 2x වේ.
- කෝණ සියල්ල එකතු කරන්න: x + 2x + 2x = 5x.
- 5x = 180° ලෙස තබා 5 න් බෙදන්න: x = 36°.
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