Question
Three numbers are in the ratio 3:5:6. If the sum of
their squares is 630, then the numbers are:Solution
Let the numbers be 3x, 5x and 6x respectively. ⇒ (3x)2 + (5x)2 + (6x)2 = 630 ⇒ 9x2 + 25x2 + 36x2 = 630 ⇒ 70x2 = 630 ⇒ x2 = 9 ⇒ x = 3 ∴ Numbers are 9, 15 and 18.
A body is said to be in equilibrium when:
Which polymer is used in the production of bullet-proof materials?
Which one among the following statements is not true for Mammals?
Which of the following is a chemical change?
Which vitamin is also known as Vitamin-B2?
If the root mean square speed of gas molecules is doubled, the absolute temperature of the gas:
Which vitamin helps in improving night vision?
Which vitamin is essential for RBC formation?
Which of the following statements for the given chemical reaction is true?
Fe₂ O₃ + 2Al → Al₂ O₃  + 2Fe
The force which opposes the relative motion between different layers of liquid or gases is called –
