The correct option is B 20 pages
Given, a student requires 8 pages to write 4 essays.
We know that if the number of essays increase, the number of pages utilised will also increase.
Number of pages(x)∝Number of essays(y)
∴x1y1 = x2y2
x1 = 4 essays
y1 = 8 pages
x2 = 10 essays
and, y2 = number of pages required
⇒48 = 10y2
⇒y2 = 10×84
⇒y2 = 20
So, the number of pages required to write 10 essays = 20