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Let the son's age = x. Father's age = 3x. After 5 years, (3x + 5) = 2(x + 5). Solving: 3x + 5 = 2x + 10 x = 5 Son’s age = 5 × 3 = 15 years. Correct answer: a) Father: 45, Son: 15
The perimeter of a square field is 10 cm more than the perimeter of a rectangle. The length of the rectangle is 60 cm which is 80% of its width. If a st...
The outer radius of a hollow metallic spherical ball is 12cm while the thickness of the metal used to make it is 8 cm. Find the volume of the metal used...
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 maximum size sphere is cut from a hemisphere of radius r. Find the ratio of volume of hemisphere to sphere?
The angle of elevation of the top of an unfinished tower at a point distant 78 m from its base is 30°. How much higher must the tower be raised (in ...
The ratio of the breadth to the length of a rectangular field is 3:4. The total cost of cutting the grass of the field at the rate of Rs 12 per m2<...
At the end of a business conference the ten people present all shake hands with each other once. How many handshakes will there be altogether?
A conical water tank has a volume of 980 m³ and the area of its base is 198 m². Calculate the length of the metal sheet required to construct the tank...
On a circular racetrack that measures 4,000 meters in circumference, Kia and Sia begin a race at the same point and at the same time, traveling at speed...
