Question
The average age of 26 children and their teacher's age
are 22 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?Solution
Sum of the age of total children and teacher = 27 times; 22 = 594 Sum of the age of children after excluding = 26 times; 21 = 546 Teacherrsquo;s age = 594 ndash; 546 = 48 years
__________ is the same at every point on a rotating body.
What is the density of an object with mass 500 g and volume 250 cm³? Â
In an experimental arrangement of a Fresnel's biprism, monochromatic light of wavelength 2. is used to produce interference fringe pattern. On introduc...
Which of the following is NOT a vector quantity? Â
Newton's rings can be obtained in:
When water is heated from 0°C to 10°C. Its volume
What is the escape velocity from the surface of the Earth?
A cylindrical wire of non-uniform cross-section has its radius increasing linearly from R to 3R over its length L. If a constant current I flows through...
An electric heater draws a current of 6 A from a 220 V supply. What is the power consumed?
Clear nights are colder than cloudy nights because of –
