Philip P. answered • 03/20/18

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The times would be inversely related to the areas of the objectives lenses of the two telescopes:

pi·(1.22/2)

^{2}/pi·(4.26/2)^{2}= t/1.51.22

^{2}/4.26^{2}= t/1.5Solve for t. The units will be hours. Multiply by 60 to convert to minutes. The time will be smaller because the larger telescope has a larger light gathering area.