Area Aptitude Test Paper 521) A 20 m long, and 15 m broad hall is surrounded by a verandah with a uniform width of 2.5 m. Find the cost of flooring the verandah at Rs. 3.50 per square meter.
Answer: C Explanation: Length of the hall = 20 m, Breadth of hall = 15 m, Area of hall = L x B = 20 x 15 = 300 m^{2} Length of hall with verandah = 20 + 2.5 + 2.5 = 25 m, Breadth of hall with verandah = 15 + 2.5 + 2.5 = 20 m, Area of hall with verandah = 25 x 20 = 500 m^{2} Area of verandah = area of hall with verandah  area of hall = 500  300 = 200 m^{2} Cost of flooring the verandah is Rs. 3.50 per square meter. So, the cost of flooring the entire verandah = 3.50 * 200 = Rs. 700 22) The height of a room to its semiperimeter is 2: 5. It costs Rs. 260 to paper the walls of the room with paper 50 cm wide at Rs. 2 per meter allowing an area of 15 cm^{2} for doors and windows. The height of the room is
Answer: C Explanation: 23) The area of a rectangular plot is increased by 30% and its width remains as it was before. What will be the ratio between the area of the new rectangle and the original rectangle?
Answer: B Explanation: Let the length and breadth of the rectangular plot be x and y respectively. 24) If the wheel of an engine of a train 4meters in circumference makes seven revolutions in 4 seconds, what is the speed of the train?
Answer: B Explanation: Circumference of a circle = 25) If the height of a triangle is decreased by 40% and its base is increased by 40%. What will be the effect on its area?
Answer: D Explanation: Let x is the base and h is the height of the triangle. Area Aptitude Test Paper 1 Area Aptitude Test Paper 2 Area Aptitude Test Paper 3 Area Aptitude Test Paper 4 Area Aptitude Test Paper 6 Area Aptitude Test Paper 7 Area Aptitude Test Paper 8 Area Concepts
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