2D and basic 3D mensuration.
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Q1 · Mensuration · EASY
The length of a rectangle is 24 cm and its breadth is 18 cm. If the length is increased by 25% and the breadth is decreased by 20%, what will be the percentage change in the area of the rectangle?
Q2 · Mensuration · MEDIUM
A circular park has a circumference of 440 metres. A path of uniform width of 7 metres runs around the outside of the park. What is the area of the path in square metres?
Q3 · Mensuration · MEDIUM
The area of a square is equal to the area of a circle. If the perimeter of the square is 88 cm, what is the circumference of the circle? (Use π = 22/7)
Q4 · Mensuration · EASY
A rectangular water tank is 8 metres long, 6 metres wide and 3 metres high. If water is filled to 75% of its height, how many litres of water does the tank contain? (1 cubic metre = 1000 litres)
Q5 · Mensuration · HARD
A cylindrical pillar has a diameter of 56 cm and height of 10 metres. Find the cost of painting the curved surface of the pillar at the rate of Rs. 15 per square metre. (Use π = 22/7)