Question

7. Three numbers are in ratio 3: 4: 5. The
sum of their cubes is 7,29,000. Find the
numbers.​

Answer 1

Answer: x=15

Let the three nos be 3x, 4x and 5x

ATQ, (3x)³+ (4x)³+ (5x³)=729000

         27x³+64x³+125x³=729000

         216x³=729000

         x³=729000/216

         x³=3375

         x=∛3375

         x=15

✌

Answer 2

Step-by-step explanation:

27x^3 + 64 x^3 + 125x^3 = 729000

216x^3 = 729000

x^3 = 3375

x = 15

3x = 3×15

= 45

4x = 4×15

= 60

5x = 5×15

= 75