Question
The average age of three children is 20 years. If their
ages are in the ratio 5:6:9. Find the age of the youngest child.Solution
Total age of three children = 20 × 3 = 60 years Let their ages be 5x, 6x and 9x respectively. => 5x + 6x + 9x = 60 => 20x = 60 => x = 3 Therefore the age of youngest child = 5 × 3 = 15 years
When heated with chloroform, secondary amines and tertiary aminesÂ
A man inside an artificial satellite feels weightlessness because the force of attraction due to earth is –
When electric current is passed through a wire, the amount of heat produced in a wire depends upon _____.
I. Length
II. Thickness
A bullet of mass 10 g is fired with a velocity of 500 m/s. Find its momentum.
The main thinking part of the brain is:
Which of the following is the first organic compound that was synthesised in the laboratory?
Which of the following is not a purpose of transpiration?
When hard water is evaporated completely, the white solid remains in the container. It may be due to the presence of
1. Carbonates of Ca and Mg
What is the name of China's recently launched largest amphibious assault vessel?
