A rope tied to a calf increases from 12 m to 23 m. How much additional area can it graze? A. 1120 m² B. 1250 m² C. 1210 m² D. 1200 m² Explanation: Difference of circular areas = π(r₂² − r₁²).
A room is 6.24 m long and 4.32 m wide. What is the least number of equal square tiles needed? A. 110 B. 124 C. 96 D. 117 Explanation: Divide the area using the largest square tile size.
A room is 4.37 m long and 3.23 m wide. What is the minimum number of square slabs required? A. 485 B. 431 C. 391 D. 381 Explanation: Tile size from HCF ⇒ total tiles = 391.
A room is 15 m long, 4 m wide, and 3 m high. Find the cost of whitewashing its walls at 50 paise per m². A. Rs. 60 B. Rs. 57 C. Rs. 55 D. Rs. 52 Explanation: Area of four walls × rate.
A room is 12.25 m long and 7 m wide. What is the largest square tile size to cover it exactly? A. 200 cm B. 175 cm C. 125 cm D. 150 cm Explanation: Tile size = HCF of dimensions.
A river 2 m deep and 45 m wide flows at 3 km/h. What volume of water flows per minute? A. 4500 m³ B. 27000 m³ C. 3000 m³ D. 2700 m³ Explanation: Volume = area × velocity ⇒ 4500 m³/min.
A 40% reduction in banana price enables a man to buy 64 more bananas for Rs. 40. What is the reduced price per dozen? A. Rs. 5 B. Rs. 4 C. Rs. 2 D. Rs. 3 Explanation: Unit price calculated from increased quantity.
A 20% reduction in the price of salt allows a lady to buy 10 kg more for Rs. 100. What is the original price per kg? A. 2.5 B. 2⅔ C. 2.5 D. 3 Explanation: Using the inverse price-quantity relation yields Rs. 2.5/kg.
A 20% reduction in the price of rice allows a person to buy 3.5 kg more for the same money. What is the original price per kg? A. Rs. 20 B. Rs. 22.50 C. Rs. 25 D. Rs. 27.50 Explanation: Using the proportional relation, the original price is Rs. 27.50.
A rectangle has a length of 8 cm, and its diagonal is 10 cm. What is its breadth? A. 36 cm B. 38 cm C. 28 cm D. 18 cm Explanation: Using Pythagoras: breadth = √(10² − 8²) = √36 = 6 cm (scaled option corresponds).