Question
Three numbers are in ratio 5:7:9. If the sum of the
squares of those three numbers is 620 then find the sum of the three numbers.Solution
A : B : C = 5x : 7x : 9x A2 + B2 + C2 = 25x2 + 49x2 + 81x2 = 155x2 => 155x2 = 620 => x = 2 => A + B + C = 5x + 7x + 9x = 21x = 21 × 2 = 42
More Ratio and proportion Questions
- What will come in place of (?) in the given expression.
(25% of 320) + (15% of 240) = ? What will come in the place of question mark (?) in the given expression?
(1040 ÷ 12) ÷ 19 × 1824 = ?
- What will come in place of the question mark (?) in the following questions?
0.5×120+25=? - Evaluate: 210 ÷ 15 × 7 + 200 – 50% of 600
36% of 640 – 12.5% of 352 + 25% of 640 = ? – 48% of 432
What will come in the place of question mark (?) in the given expression?
(63 - ?) ÷ 5 + √625 = 19 X (9 - 6)
If 840 ÷ 12 + 1025 ÷ 25 - n + 45 × 4 = 960 ÷ 16 × 132 ÷ 44, then the value of n is:
(122 - 82 ) of 52 + 52 = ?2Â
18, 25, 33, 42, 52, 63, ?
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