alleryਇੱਕ ਆਇਤਕਾਰ ਦੀ ਲੰਬਾਈ ਵਧਦੀ ਹੈ 20% ਅਤੇ ਚੌੜਾਈ ਘਟਦੀ ਹੈ 10%; ਖੇਤਰ ਤਬਦੀਲੀ?
A12% ਵਾਧਾ
B8% ਵਾਧਾ
C8% ਕਮੀ
D10% ਵਾਧਾ
Answer & Solution
Correct answer: B. 8% ਵਾਧਾ
ਨਵਾਂ ਖੇਤਰ 1.20 × 0.90 = 1.08 ਪੁਰਾਣੇ ਖੇਤਰ ਦਾ ਗੁਣਾ ਹੈ, ਇੱਕ 8% ਵਾਧਾ।
Keep practising Mensuration
Browse all Mensuration questions for RPF Constable, or explore more Arithmetic topics.
Related questions
Mensuration: choose the measureA circular sector of radius 21 cm has perimeter 86 cm. Find its area; use π = 22/7.A rhombus has diagonals 16 cm and 30 cm. What are its area and perimeter?A trapezium has parallel sides 18 m and 30 m, with height 10 m. Paving costs ₹12 per m². TA full cylinder (r=6,h=8 cm) contains a solid cone of the same r,h. Pour its water into a A radius-7 cm cylinder of height 10 cm has a matching hemisphere on top. Area exposed exclA radius-6 cm sphere is melted into cones of radius 2 cm and height 3 cm, with no loss. HoA hemispherical dome has radius 7 cm. Its curved covering needs how much material? Use π =