Question

The sum ofthe square of the first number and the cube of the second number together is 568. Also, the square of the second number is 15 less than the square of 8. What is the value of three-fifths of the first number?(assuming both the numbers are positive)
1)18
2) 8
3) 9
4)16
5) None of these

Answer 1

the right answer is-
1st no.will be 15 so 3/5 of 15 is 9(c)

Answer 2

Hey !!!!
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☺☺☺
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Let the 1st number be 'a' and 2nd number be 'b'......
It's Given that,
=> b^2 = (8)^2 -15
=> b^2 = 49
=> b = 7
...............
So Now,
It's above mentioned that
=> a^2 + b^3 = 568
=> a^2 + (7)^3 = 568
=> a^2 = 568 - 343
=> a = 15
................
Now, We know the first number that is 15
So,
=>3/5×15
=>9
................
So, The Right Answer is 3) 9.
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Hope it may HELP U
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