1.

a, b, c are in continued proportion. If a = 3 and c = 27, then find b.

Answer»

a, b, c are in continued proportion. … [Given] 

∴ b2 = ac 

∴ b2 = 3 x 27 …[∵ a = 3 and c = 27] 

∴ b2 = 81

∴ b = 9 …[Taking square root of both sides]



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