Bricks pyramid

How many 50cm x 32cm x 30cm bricks are needed to build a 272m x 272m x 278m pyramid?

Correct answer:

n =  142830222

Step-by-step explanation:

278 m = 2780 dm = 22 × 5 × 139 dm 272 m = 2720 dm = 25 × 5 × 17 dm  a=272 m h=278 m  x=50 cm→ m=50:100  m=0.5 m y=32 cm→ m=32:100  m=0.32 m z=30 cm→ m=30:100  m=0.3 m  V0​=x⋅ y⋅ z=0.5⋅ 0.32⋅ 0.3=1256​=0.048 m3 V=31​⋅ a2⋅ h=31​⋅ 2722⋅ 278≐6855850.6667 m3  n=V/V0​=6855850.6667/0.048=142830222

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You need to know the following knowledge to solve this word math problem:

algebraarithmeticsolid geometryplanimetricsbasic operations and conceptsnumbersUnits of physical quantitiesGrade of the word problem

 
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