The diameters of two cones are equal. If their slant heights are in the ratio of 5 : 4, find the ratio of their curved surface area.
4 : 5
5 : 5
5 : 4
4 : 4
A solid rectangular block of metal 49 cm by 44 cm by 18 cm is melted and formed into a solid sphere. Calculate the radius of the sphere.
21 cm
20 cm
19 cm
25 cm
The diameter of the base of a right circular cylinder is 28 cm and its height is 21 cm. Find its curved surface area.
1488 cm2
1248 cm2
3080 cm2
1848 cm2
Find the circumference of the circle whose area is 16 times the area of the circle with diameter 1.4m.
16.7 m
17.6 m
17.7m
17 m
A cylinder has a diameter of 20cm. The area of curved surface is 100cm2 (sq.cm) and height is 1.6 cm. Find the volume of the cylinder correct to one decimal place.
600cm2
400cm2
500cm2
500.1cm2
The square areas of two spheres are in the radius of 9 : 25. Then their volumes are in the ratio
81 : 625
729 : 15625
27 : 75
27 : 125
Find the depth of a cylindrical tank of radius 28m, if its capacity is equal to that of a rectangular tank of size 28m x 16 m x 11m.
2.5 m
2 m
2.75 m
3 m
Determine the ratio of the volume of a cube to that of a sphere which will exactly fit inside the cube.
11 : 21
1 : 2
21 : 11
10 : 16
A solid metal sphere is cut through its centre into 2 equal parts. If the diameter of the sphere is , find the total surface area of each part correct to two decimal places.
20.88 cm2
25.89 cm2
28.86 cm2
28.88cm2
The area of the base of a conical solid is 154 cm2 and its volume is 1232 cm3. Find curved surface area of the solid.
500 cm2
552 cm2
553 cm2
550 cm2