Question

Base of a right pyramid is a square of side 10 cm . if the height of the pyramid is 12 cm , then its total surface area is

Answer 1

total surface area = area of two bases + lateral surface area

now,
area of base is a square so area of each base = 10*10 = 100 sq unit
there are two bases so total area of base = 200 sq unit


now
lateral surface area = perimeter of edges * height
= 4*10*12 = 480sq unit

total surface area = 200 + 480 = 680 sq unit

Answer 2

Answer:

Step-by-step explanation:

total surface area = area of two bases + lateral surface area

now,

area of base is a square so area of each base = 10*10 = 100 sq unit

there are two bases so total area of base = 200 sq unit

now

lateral surface area = perimeter of edges * height

= 4*10*12 = 480sq unit

total surface area = 200 + 480 = 680 sq unit