Math, asked by radhika731591, 1 year ago

how to solve this.... 360=20√4a^2-(80)^2

varun000: it's wrong

Answers

Answered by mysticd

Answer:

360 = 20√4a²-80²

=> 360/20 = √4a²-80²

=> 18 = √4a²-80²

=> 18² = 4a²-80²

=> 324+6400 = 4a²

=> 6724 = 4a²

=> 6724/4 = a²

=> 1681 = a²

=> 41² = a²

=> a = ± 41

••••

Answered by varun000

hope it helps you dear....

Attachments:

mysticd: wait , Let her clarify , which is correct.

varun000: you can't divide by 20 directly as there's another quantity which is subtracting

mysticd: I took 360 = 20[√4a² - 80²]

mysticd: it is not clearly mentioned in the question.

varun000: oky

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