If 256, K, K, 81 are in proportion, and K is positive, then what is the value of K ?
Answer & explanation
Correct answer: option 3
Here,
256 : k :: k : 81
⇒ \( {k }^{2 } \) = 256 x 81
⇒ k = \(\sqrt {256 × 81 }\)
⇒ k = 16 x 9
⇒ k = 144.
If 256, K, K, 81 are in proportion, and K is positive, then what is the value of K ?
Correct answer: option 3
Here,
256 : k :: k : 81
⇒ \( {k }^{2 } \) = 256 x 81
⇒ k = \(\sqrt {256 × 81 }\)
⇒ k = 16 x 9
⇒ k = 144.