Value of an import after a percentage customs duty
Rs 68,400
💡 What it's asking: A duty is an extra charge worked out as a percentage of the price. Find the extra amount, then add it on.
- Find 1% of 60 000: 60 000 ÷ 100 = 600.
- Find 14%: 600 × 14 = 8400. This is the duty.
- Add it to the starting value: 60 000 + 8400 = Rs 68 400.
✅ 14% is a bit more than 10% (6000), so the answer should be a little more than 66 000, and 68 400 fits.
සිංහලෙන් විසඳුම
බද්දක් යනු මිලේ ප්රතිශතයක් ලෙස ගණනය කරන අමතර ගාස්තුවකි. අමතර මුදල සොයා එය එකතු කරන්න.
- 60 000 න් 1% සොයන්න: 60 000 ÷ 100 = 600.
- 14% සොයන්න: 600 × 14 = 8400. මෙය බද්දයි.
- මුල් වටිනාකමට එකතු කරන්න: 60 000 + 8400 = රු. 68 400.
Apex angle of an isosceles triangle from an exterior angle
80°
💡 What it's asking: The 130° is outside the triangle. Turn it into the inside angle, then use the equal sides.
- At B the straight line makes 180°, so the inside angle is 180° − 130° = 50°.
- Sides CA and CB are equal, so the angles at A and B are equal: both 50°.
- Angles in a triangle add to 180°: 180° − 100° = 80°.
✅ 50° + 50° + 80° = 180°, so it works.
සිංහලෙන් විසඳුම
130° ත්රිකෝණයෙන් පිටත ඇත. එය ඇතුළත කෝණයක් බවට පත් කර සමාන පාද භාවිත කරන්න.
- B හි සරල රේඛාව 180° නිසා ඇතුළත කෝණය 180° − 130° = 50°.
- CA සහ CB සමාන නිසා A සහ B හි කෝණ සමානයි: දෙකම 50°.
- ත්රිකෝණයක කෝණ එකතුව 180°: 180° − 100° = 80°.
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