The total surface area of a hemisphere is 41.58 sq cm, find its radius. 1). 4.2 cm2). 0.7 cm3). 1.05 cm4). 2.1 cm
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1. Given that the ratio of altitudes of two triangles is 4:5, ratio of their is 3:2. The ratio of their corresponding bases is
2. The base of a parallelogram is 35 cm and the area of an isosceles triangle constructed on the same base and between the parallel lines of the parallelogram is 630 cm2. What is the vertical distance between the parallel lines?
3. A right triangle with side 9 cm, 12 cm and 15cm is rotated about the side of 9 cm to form & cone .The volume cf the cone so formed is :
4. A right circular cone is 3.6 cm high and radius of its base is 1.6 cm. It is melted and recast into a right circular cone with radius of its base as 1.2 cm . Then the height of the cone (in cm) is
5. The ratio of radii of two cone is 3:4 and the ratio of their height is 4:3. Then the ratio of their volume will be
6. A solid cone of height 9 cm with diameter of its base 18 cm is cut out from a wooden solid sphere of radius 9 cm. The percentage of wood wasted is :
7. The circumference of the semicircle is 108 cm. If the side of a square is 30% more the diameter of the semicircle, what is the perimeter of the square ?
8. The heights of a cone and a cylinder are equal. The radii of their bases are in the ratio 2 : 1. The ratio of their volumes is:
9. What is the length of the side of an equilateral triangle, if its area is 36√3 sq cm?
10. The capacities of two hemispherical vessels are 6.4 litres and 21.6 litres. The ratio of their inner radii is
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