Mrs.Wang is 23 years older than her daughter. In 5 years, their ages will total 63. How old are they now
2 answers:
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Answer:
384 cm²
Step-by-step explanation:
Since it is a square pyramid, the total surface area of the pyramid is the area of its square base plus the area of its 4 triangular faces.
Area of a triangular face
= ½ ×12 ×10
= 60 cm²
Base area of pyramid
= 12 ×12
= 144 cm²
∴ Surface area of pyramid
= 4(60) +144
= 240 +144
= 384 cm²
Answer:
Step-by-step explanation:
simplify the radical by breaking the radicand up into a product of know factors