Question

3 Sum of three numbers which are in the ratio 3:4:5 is 60. What is the sum of
their squares?
(A)1970
(B)1430
(C)1250
(D)1760​

Answer 1

Answer:

Explanation:

Given, three numbers are 3x, 4x, 5x and their sum is 60.

So,

⇒ 3x+4x+5x=60

⇒12x = 60

⇒x= 60/12

⇒x= 5

Now, sub x=5 in given numbers

we get, 1st number ⇒ 3x=3(5) = 15

            2nd number ⇒ 4x= 4(5) = 20

            3rd number ⇒ 5x= 5(5) = 25

So now sum of their squares is

       ⇒ (15)² + (20)² + (25)²

       ⇒ 225 + 400 + 625

       ⇒ 1250

Hence, answer is 1250.

Hope you get it.

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