Question
A plane electromagnetic wave travels in vacuum along
z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 50 MHz, what is its wavelength?Solution
18 × 15 + 86 – 58 = ? + 38
The perimeter of a rhombus is 130 m. If one of its diagonals is 16 m, then the area of the rhombus is
A cone has a radius of 5 cm and a slant height of 13 cm. Find the total surface area of the cone.[Take π = 3.14 ]
If the area of a triangle is 1125 cm2 and base: corresponding altitude is 2:5, then the altitude of the triangle is:
Find the time taken by a pipe, which releases 300 m3 of water in a minute to fill an empty cylindrical tank of radius 10 m and height 10 m. [...
A sphere of the greatest possible size is enclosed within a cube whose edge length is 28 cm. Calculate the surface area (in cm²) of the sphere. (Take �...
Area of a rectangle is equal to the total surface area of a hemisphere having volume 13718 cm³ . Find the perimeter of the rectangle if its length is 1...
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?
The area of the circumcircle of an equilateral triangle is 3π cm². The perimeter of the triangle is:
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