Question
What do we call sound waves with frequencies below 20
Hz?Solution
Infrasonic waves are sound waves with frequencies below the range of human hearing, typically below 20 Hz.
Nine cubes with each side measuring 3 cm are aligned in a straight row to build a cuboid. What is the total surface area of the resulting cuboid?
If the height of a cylinder is increased five times and radius is reduced by 40%, then what is the percentage change in its volume?
- Three cubes, each having a side length of 9 cm, are connected in a straight line. Calculate the total surface area of the formed cuboid.
The area of four walls of a room is 140 cm2. If the length and breadth of the room were equal and the height of the room is 5 cm, then what i...
A rectangular piece of copper foil of length 21 cm and area 1386 cm2 is folded along its width to form a cylinder such that there is only one...
Calculate the base length of a triangle given that its area is 640 cm² and the altitude corresponding to this base measures 40 cm.
The cost of levelling a square field @ Rs.32 per sq. metre is Rs.2,88,800. Field is to be fenced and also 2 metres broad pathway is to be constr...
- The area of the base of a rectangular reservoir is 960 m² and the volume of water contained in it is 38400 m³. Find the depth of the water in the reservo...
What is the difference between (in m2) the area of a circular field of radius 21 metres and area of a rectangular piece of land having its di...
A race track is in the shape of a rectangle with length of 13 metres and area of 1300 m2. A car takes 10 seconds to make one lap around the p...
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