Question
The average of the observations is 83, the average of 10
more observations is 60 and the average of 15 more observations is 45. What will be the average of all 32 observations?ÂSolution
The correct answer is D
If the length and breadth of a rectangle are each increased by 4 m, its area increases by 224 m². The ratio of the perimeter of the square to that of t...
If the word PHOTOGRAPH is spelt with ‘F’ in place of ‘PH', then what would be the percentage reduction in the number of letters?
Curved surface area of cylinder is 215.6 cm2. If ratio of radius to height of the cylinder is 10:4 respectively, then find the base area of t...
- The volume of a sphere is 3888 cm³. Calculate the surface area (in cm²) of the sphere. [Use π = 3]
The difference between the length and breadth of a rectangle is 27 m. If its perimeter is 194 m, then its area is
Cylinder radius = 7 cm, height = 12 cm. It is melted into cones of radius 3.5 cm, height 8 cm. Find number of cones.
The ratio of the largest and the smallest angle of a triangle is 3:2. The smallest angle is 80% of the sum of these two angles. What is the sum of the r...
The area of a square field is 800 sq m. How long in seconds will a lady take to cross the field diagonally at the rate of 4.8 km/hr?
Consider a circle and a square whose circumference ratio is 11:8. If the sum of the circle's radius and the length of one side of the square equals 30 c...
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