Question
X and Y together complete a job in 18 days, while Y
alone can do it in 30 days. The ratio of efficiencies of X and Z is 4:5 respectively. What is the ratio of efficiencies of Y and Z?Solution
ATQ,
Let total work = 90 units {LCM of 18 and 30}
Efficiency of (X + Y) = 90/18 = 5 units/day
Efficiency of Y = 90/30 = 3 units/day
Therefore, efficiency of X = 5 – 3 = 2 units/day
Efficiency of Z = 2 × (5/4) = 2.5 units/day
Required ratio = 3 : 2.5 = 6 : 5
Some balls are to be distributed among some boys. If 5 more balls are available, each boy gets 8 balls. If 6 less balls are available, each boy gets 4 b...
A rectangular tank is 60 meters long and 40 meters deep. If 1800 cubic meters of water is drawn off the tank, the level of the water in the tank goes do...
The perimeter of a rectangle is 50% more than perimeter of a square of side 25 cm. If the length of rectangle is 100% more than side of square then fin...
Curved surface area of cylinder is 1617 cm2. If ratio of radius to height of the cylinder is 25:21 respectively, then find the base area of t...
The perimeter of a rectangular field is 42 metres and its area is 108 m2 . What is the length of the diagonal of this field?
The capacity of a cylindrical tank is 2376 m³. If the radius of the tank is 21 m, then the depth of the tank is:
The length and breadth of a rectangular field are 51m and 30m respectively. A tank of length 8m, breadth 7m and depth 5m is dug out at the middle of the...
- A hollow cylindrical pipe has an inner radius of 8 cm. If the length of the pipe and the thickness of the pipe are 12 cm and 2 cm, respectively, determine ...
The lateral surface area of a cube is 324 cm2 . The length of a cuboid is 50% more than the side of the cube. The breadth of the cuboid is 9 ...
The total area of a circle and a square is 6350 cm2, the diameter of the circle is 70cm, what is the difference between the circumference of ...
