A bit-map terminal has a 1024x768 display. the display is redrawn 75 times a second. how long is the pulse corresponding to one pixel

The display is 1024 x 768, so the number of pixels is 1024*768 = 786,432.

It takes 1 second to draw these number of pixels 75 times.

The drawing rate is

(75*786,432 pixels) per second

The length of the pulse to draw a pixel is

1 / (75*786432) s = 1.6954 x 10⁻⁸ s = 0.1695 x 10⁻⁹ s = 0.1695 ns

Answer: 0.17 ns (nanosecond) or 1.695 x 10⁻⁸ s