North Western Province 11 ශ්‍රේණිය ගණිතය 2 වාර පරීක්ෂණය 2024

Customs duty at 32% on an imported item worth Rs. 60 000

පිළිතුර: Rs. 19 200

💡 ප්‍රශ්නයේ අදහස: තීරු බද්ද භාණ්ඩයේ වටිනාකමේ ප්‍රතිශතයකි. මෙහි අවශ්‍ය බද්ද පමණි: රු. 60 000 න් 32%.

1. 132% යන්න 32/100 ලෙස ලියන්න.
2. 2තීරු බද්ද = 60 000 × 32/100.
3. 3බිංදු දෙක කපා හරින්න: 600 × 32 = රු. 19 200.

✅ 60 000 න් තුනෙන් එකක් 20 000; 32% තුනෙන් එකකට මඳක් අඩු නිසා 19 200 සාධාරණයි.

Multiply two algebraic fractions and simplify

පිළිතුර: 1/(2a)

💡 ප්‍රශ්නයේ අදහස: භාග ගුණ කිරීමේදී ලවයේ හා හරයේ පොදු දේ මුලින්ම කපා හරින්න. මෙහි 5b කැපේ.

1. 1එක් භාගයක් ලෙස ලියන්න: (5b × 4)/(8a × 5b).
2. 2ලවයෙන් හා හරයෙන් 5b කපා හරින්න: 4/(8a).
3. 34/8 = 1/2 ලෙස සරල කළ විට පිළිතුර 1/(2a).

✅ a = 1, b = 1 ලෙස ගන්න: 5/8 × 4/5 = 20/40 = 1/2, හා 1/(2a) = 1/2. ගැළපේ.

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