There are 3 sphere having r cm radius which are completely fit (vertical manner) in a cylinder. Those sphere cut out from the cylinder. What the ratio of total surface area of all three sphere to curved surface area of cylinder?
1). 1 ∶ 1
2). 2 ∶ 3
3). 3 ∶ 1
4). 4 ∶ 5
The volume of a solid hemispherical object is 19404 cm3. Its total surface area is –
1). 4158 cm2
2). 4923 cm2
3). 4518 cm2
4). 4815 cm2
The perimeter and the breadth of a rectangle are 52 cm and 12 cm respectively. Find its area (in cm2).
1). 84
2). 336
3). 168
4). 252
A trapezium of area 55 cm2 can be divided into a rectangle and two equal triangles. If the parallel sides of the trapezium are of 15 cm and 7 cm, find the area of the triangle.
1). 10 cm2
2). 20 cm2
3). 25 cm2
4). 35 cm2
If the length of one side and the diagonal of a rectangle are 8 cm and 17 cm respectively, then find its perimeter (in cm).
1). 92
2). 48
3). 46
4). 96