Regulation size of a Tennis racket cannot have a hitting surface larger then. a.12.5 inches in width

b.11 inches in width

c. 11.5 Inches in width

d.12 inches in width​

C.

Explanation:

"A racquet can be a maximum of 29 inches long while the hitting surface (the head) cannot be more than 15.5 inches in length and 11.5 inches wide."

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards