An equilateral triangle is described on the diagonal of a square. What is the ratio of the area of the triangle to that of the square? |
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(a) |
2: |
(b) |
4: |
(c) |
|
(d) |
|
An equilateral triangle is described on the diagonal of a square. What is the ratio of the area of the triangle to that of the square? |
|||||||
(a) |
2: |
(b) |
4: |
(c) |
|
(d) |
|
Let the side of each square = cm.
Length of diagonal = cm.
Area of equilateral triangle with side.
Req. ratio = .
In a communication system operating at wavelength 800mm, only one percent of source frequency is available as signal bandwidth. The number of channels accommodated for transmitting TV signals of band width 6 MHz are (Take velocity of light c=3× 108m/s,h = 6.6 × 10−34 J s)
a. |
3.75×106 |
b. |
4.87×105 |
c. |
3.86×106 |
d. |
6.25×105 |
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