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Let the width of the rectangle be x meters. Length = 2x meters. Perimeter of rectangle = 2(length + width) = 60 meters. 2(2x + x) = 60 6x = 60 x = 10. So, the width is 10 meters, and the length is 20 meters. Area = length × width = 20 × 10 = 200 sq. meters. Answer: a) 200 sq. meters
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Curved surface area of a cylinder is 440 cm². The base circumference is 44 cm. What is its volume?
A solid right circular cylinder is melted and shaped into a right cone with a base of equal radius. By what percent is the length of the solid increased?
If the length of the rectangular pipe is 2 times of its breadth and 5 times of its height. Find the total surface area if its volume is 600 cm³?
Steel is used to make a hemispherical bowl that is 0.4 cm thick. The bowl's inner radius is 7 cm. Find the bowl's outside curved surface.
There is a carpet of length 20 m. How many small pieces of carpet, each of length 4 m, can be cut out of it?
Calculate the surface area of a sphere, given that its volume is (792/7) cm3.
A girl spent 20% of her monthly income on clothing. Of the remaining, she spent on travel and food in the ratio of 3:2. If the difference of the income ...