Required ratio = 280 : 140 = 2:1
 A hollow spherical metallic ball has an external diameter 8cm and is 1/2cm thick. The volume of the ball (in cm cube) is.
The sum of the area of rectangle A and B is 2964 cm 2 . The ratio between the breadth of rectangle A and length of rectangle B is 2:3 respect...
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 ...
Determine the slant height of a cone with a volume of 1,884 cm³ and a base radius of 15 cm. (Use π = 3.14)
Three cubes with sides 1.5 cm, 2 cm and 2.5 cm are melted to form a bigger cube. The surface area of the bigger cube is: (in cm 2)
A group of boys has an average weight of 44 kg. One boy weighing 50 kg leaves the group and another boy weighing 40 kg joins the group. If now the aver...
The outer radius of a hollow metallic spherical ball is 12 cm while the thickness of the metal used to make it is 6 cm. Find the volume of the metal use...
A solid rectangular block with dimensions 60 cm × 40 cm × 20 cm is melted down, and identical smaller rectangular blocks, each with a volume of 80 cmÂ...
If the side of square and its area is in the ratio of 7:28 then find its perimeter?
In a rectangular floor of length and breadth of 21 metres and 4 metres, respectively, square tiles each of 2 metre edge length are to be laid. If the co...
