Question
'P', 'Q', and 'R' appeared in an exam. 'P' scored 60%
marks in an exam which was 90 more than passing marks. Whereas 'Q' scored 50% marks in the exam which was 20 marks less than the passing marks. If 'R' scored 85% marks in the exam, then find the difference between marks scored by 'P' and 'R' in the exam.Solution
ATQ, Let the total marks be 'U'. So, (60% of U) - 90 = (50% of U) + 20 Or, 0.6U - 90 = 0.5U + 20 Or, 0.1U = 110 So, U = 1100 Required difference = (0.85 - 0.6) × 1100 = 275
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 an alpha particle which is emitted in radioactivity?
A copper block of mass 3 kg is heated in a furnace to a temperature of 450°C and then placed on a large ice block. Find the maximum amount of ice that...
Which graph represents uniform motion?
What type of lens is used to correct myopia (shortsightedness)? Â
The part of the eye having the largest refractive index is -
The ratio of the total distance traveled by a body to the total time taken is its:
The time period of a simple pendulum depends on — Â
When a passenger in a moving bus is suddenly thrown forward when the bus stops, this is explained by:
What device is used to measure electric current? Â
Relevant for Exams:
