Question
The layer of atmosphere used for radio- wave
transmission is –Solution
The ionosphere is a part of the upper atmosphere and is ionized by solar radiation. It plays an important part in atmosphericelectricityandformstheinneredge of the magnetosphere. It has practical importance because, among other functions, it influencesradiopropagationtodistantplaceson the Earth.
Due to economic surge the price of eggs suddenly reduced by 40%. This enabled a woman to buy 64 more for $30. Then the reduced price per dozen is :
If tan θ + cot θ = 5, then the value of tan2 θ + cot2 θ + 2tan2 60° is:
A giant circular wheel has a diameter of 7 metres. In how many revolutions will the wheel cover a total of 16.5 km?
A wire is bent to form a square whose sides are of 99 cm. If the same wire is bent to form a circle, then find the area (in cm2) of the circl...
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...
The area of a square is 729 cm2 which is 48 cm2 less than that of a rectangle. Find the perimeter of the rectangle if the length o...
The length and breadth of a rectangle are increased by 35% and 40% respectively. The increase in the area of the resulting rectangle will be:
The ratio of the length of a rectangle, breadth of the rectangle and the diameter of a circle is 10:9:7. If the area of the circle is 616 cm2...
The perimeter of a square field is 14 cm more than the perimeter of a rectangle. The length of the rectangle is 49 cm which is 350% of its width. If a s...
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