Math, asked by andymukhrj, 1 year ago

{(27)^3+
(54)^3}/ {(85)^3+ (95)^3} =X^3 Find the value of X?

dheeerajbolisetti: is this question is correct

andymukhrj: I think so..i got this from a bank question paper..but i dont have the ans..bears only 1 mark and 30 sec to solve it !!!!!!!!

dheeerajbolisetti: because the answer will be in 0,0000 something

Answers

Answered by Shravani83

$\frac{27 ^{3} + 54^{3} }{85 ^{3} + 95 ^{3} }$ = X³
L.H.S:
⇒ $\frac{19683 + 157464}{614125+857375}$
⇒ $\frac{177147}{1471500}$
⇒ 0.120

Now equating,
X³ = 0.120
X = ∛0.120
X = 0.493

dheeerajbolisetti: shravani dont mind that this question was from bank paper there will be a simple logic rather than putting value nd solving .:P

Shravani83: The way i could solve i have done it..!! I have seen the comments.. This is the only way i know right now.

andymukhrj: Thanks for ur help folks...bt even if u know the shortcut method for cube ...thats not going to help to solve this within stipulated tym...there must be some logic which is yet to be found...and dats where i stuck..As all the bank exams are online you have to solve almost the whole paper with mental calculation as you will not have any tym to write the problem on a paper and solve it...Thakx N E WYZ

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{(27)^3+ (54)^3}/ {(85)^3+ (95)^3} =X^3 Find the value of X?

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{(27)^3+
(54)^3}/ {(85)^3+ (95)^3} =X^3 Find the value of X?