RRB RPF RPSF SI and CONS Model Papers 10 with solutions

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Question : 59 of 120

Marks: +1, -0

If

a : b = b : c

, then

a ^4 : b^ 4

is equal to

$ac : b^ 2$
$a^ 2 : c^ 2$
$c ^2 : a^ 2$
$b^ 2 : ac$

Solution:

(2)

a/b=b/c

⇒ b^{2}=a c ⇒ b^{4}=a^{2} c^{2}

∴

∴{a^{4}}/{b^{4}}= {a^{4}}/{a^{2} c^{2}}= {a^{2}}/{c^{2}}

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