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MNAISH JOSHI

· started a discussion

· 1 Months ago

i think answer may be A

Question:

DIRECTIONS: What should come in place of the question mark (?) in the following question?


\(\sqrt[3]{?} = (28\div14)\div7\)

Options:
A) 157464
B) 74088
C) 117649
D) 175616
E) None of these
Solution:
Ans: (e)

\(\sqrt[3]{?}\) = (28 \(\div\) 14) \(\div\) 7

\(\sqrt[3]{?}\) = 2 \(\div\) 7

(?)1/3 = \(\cfrac{2}{7}\) 

\(? = \left ( \cfrac {2}{7} \right )^3 = \cfrac{8}{343}\)

kanhaiya jha

· commented

· 1 Months ago


Cube root of ?=(28÷14)÷7
Cube root of ?=2/7

Now, on cubing both side,
? = (2/7)^3
? = 8/343 = 0.023323

Hence, option(e) is correct..

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