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Square pyramid from base side and height: slant height, then lateral or total surface area

This type of question, asked 2 times: 15 Nov 2020 Tier II, 3 Mar 2023 Tier II. All 2 questions below, oldest first.

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  1. Question 1

    15 Nov 2020 Tier II

    17
    The base of a right pyramid is a square of side 10 cm. If its height is 10 cm, then the area (in cm2\text{cm}^2) of its lateral surface is:

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  2. Question 2

    3 Mar 2023 Tier II

    23
    What is the total surface area of a pyramid whose base is a square with side 8 cm and height of the pyramid is 3 cm?

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