Help pls this is really confusing

Two cones have a scale factor of 2 : 5. The smaller cone has a surface area of 96π square yards. Find the surface area of the larger cone. Write your answer in terms of π.

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.