exam Maths Puzzle Numerical Ability

Telephoto Lens. Use the formula 1 / f = 1 / o + 1 / i to find the image distance i for an object that is 2,000,000 mm from a 250-mm telephoto lens.

Read Solution (Total 0)

exam Other Question

Tom tried to compute the average of his 7 test scores. He mistakenly divided them by 6, which yeilds 84. What is the correct average test score? The length of a rectangle is 6 ft longer than its width. The perimeter is 84 ft . What is the length?

84=2w+2l then I forget how to do this. Thank you.