Question
A bag contains 13 white and some black balls. If
the probability of drawing a black ball from the bag is twice that of drawing a white ball, find the number of black balls in the bag.Solution
The ratio of the diagonals of a rhombus is 5:6, and the difference between their lengths is 7 cm. Find the area of the rhombus.
The length of sides of a square is twice the radius of a circle and perimeter of a rectangle is half the perimeter of the square. If the sum of length a...
If the area of a square is 144 cm² and the breadth of a rectangle is 20% more and the length is 50% more than the side of the square, then find the rat...
A rectangular tank is 50 meter long and 29meter deep. If 1000 cubic meters of water be drawn off the tank, the level of the water in the tank goes down ...
A cube of 25 cm side is divided into 125 smaller cubes of equal volume. Find the side of smaller cubes:
A circular garden has a radius of 14 m. A path of width 2 m is constructed all around it outside. Find the approximate area of the path. (Use π = 22/7)
- The volume of a sphere is 3888 cm³. Calculate the surface area (in cm²) of the sphere. [Use π = 3]
Mohini's Biology test had 250 questions i.e. 20 Macromolecules, 60 Homeostasis and 70 Immunology questions. Although she answered 70% of the Macromolecu...
Length of a rectangle is equal to the side of a square. If area of the square and rectangle is 676 m2 and 390 m2, respectively the...
The length of a rectangle is 5 metres more than its width. If the perimeter of the rectangle is 62 metres then what is the area (in m2Â ) of ...
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