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Abhishek tyagi

· started a discussion

· 1 Months ago

Trick?? (Question: 193742.0 )

Is there any trick to this question for cube root of 4998??..... ya bas ye dimaag ki dahi krne ke liye tha???

Question:
The volume of a solid hemispherical object is 10472 cm3. its total surface area is –
Options:
A) 2757.008 cm2 
B) 2775.008 cm2
C) 2575.008 cm2 
D) 2600.008 cm2 
Solution:
Ans: (a)


shivendra saxena

· commented

· 1 Months ago

is it possible to solve this ques. in less than a minute??????

Knowledge Expert

· commented

· 1 Months ago

Since 4998 is closet to 4913

∛ 4913= ?

Unit digit of number is 3

∴ Unit digit of cube root will be 7

Now we will consider 4000

Since, 1^3 < 4000 < 2^3

So, we find cube root of the number to be 17.

Practice this technique to help you in the exams. There is no easier way to find cube root of a number.

Thank you
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