Math, asked by singhajitsingh752, 10 months ago

यदि किसी घन की कोर को 4 cm बढ़ा दिया जाए, तो इसका आयतन 988 cm बढ़ जाता है। तो धन की प्रत्येक कोर की मूल लम्बाई कितनी है?

Answers

Answered by deepakjha2835
2

Step-by-step explanation:

let side = r

then extend side = (r+4)

we know that volume of cube is a^3 .

so (r+4)^3 - (r)^3 = 988

using (a+b) ^3 rule...open bracket and solve quadratic equation.

then we find r = 7 cm.

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