Question

The slant height of a square pyramid is 25cm and total surface area is 896cm2 find the base edge
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Answer 1

Answer:

b = 14cm

Step-by-step explanation:

SL = 25cm

Total S.A = 4*(0.5*b*h) + b²

⇒ 2bh + b²

∵ h = 25cm,

Total S.A = b²+50b

b²+50b = 896

(b-14)(b+64) = 0

b = 14 or 64,

∵ b is a length, therefore it must be positive,

∴ b = 14cm.