What is the altitude of an equilateral triangle whose side is 12√3 cm?1). 12 cm 2). 15√3)/2 cm3). (9√3)/2 cm4). 18 cm
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1. The curved surface area of a hemisphere is 110.88 sq.cm and volume is 155.232 cubic cm, find its radius?
2. The radius and height of a right circular cone are in the ratio 4 : 7. If its volume is 1008π cm3, then find its slant height?
3. The diameter of a roller is 91 cm and its length 100 cm. It takes 400 complete revolution to move once over to level a playground. Find the area of the playground in square metre.
4. The length and breadth of a rectangular field are increased by 15% and 10% respectively. What will be the effect on its area?
5. A solid sphere of diameter 17.5 cm is cut into two equal halves. What will be the increase (in cm2) in the total surface area?
6. If the perimeter of a semi-circle is 108 cm, then find its radius (in cm).
7. The height of a room is twice its breadth and breadth is 1/16thof its length. If its volume is 4000 m3, then what is its height?
8. A wire is bent into the form of a circle, whose area is 154 sq.cm.. If the same wire is bent Into the form of an equilateral triangle, the approximate area of the equilateral triangle is
9. A wire is in the form of a circle of radius 98 cm. A square is formed out of the wire. What is the length of a side of the square? (Use π = 22/7)
10. If the area of a triangle is 3549 m2 the ratio of its height to its base is 6 : 7, then the base of triangle is:
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