Question
The mean of two samples sized 50 and 100 are 54.1 and
50.3 respectively. The standard deviation of these sample are 8 and 7 respectively. What will be the value of combined mean and standard deviation?Solution
The breadth of a rectangle is increased by 10 cm, it will become twice the length of the rectangle. If the new perimeter is 336 cm, then find the origin...
The length of a rectangle is 9 metres more than its width. If the perimeter of the rectangle is 62 metres then what is the area (in m2Â ) of ...
The area of the rectangular field is 480 m² and its perimeter is 88 m. Find how much percent less the breadth of the field is compared to the length of...
- Calculate the diameter of the in-circle of a triangle whose semi-perimeter is 20 cm and its area is 60 cm².
If A’s income is 60% more of B’s income and B’s income is 40% less than C’s income, then by what percent is C’s income mor...
The area of a rectangular field is 4374 m2 and its length to breath is in the ratio of 3:2. What is the perimeter of the field?
- The volume of a cube is 1331 cm³. If the cost of painting the cube is Rs. 7 per cm², then find the cost of painting five faces of the cube.
The cost of fencing a rectangular field at the rate of Rs. 5 per meter is Rs.350. If the length of the field is 15 meters more than its breadth, then fi...
The ratio of volumes of spheres A and B is 8:27. If the difference between their total surface area is 3080 cm² then find diameter of sphere A. (in cm)...
A tank whose length, width and height are 20 metres, 18 metres and 10 metres respectively is completely filled with juice. If the juice costs Rs.4/m
