Question
Six years ago, the age ratio of A to B was 5:6. In nine
years, their age ratio will become 8:9. Determine the difference between their current ages.Solution
6 years ago, Let the age of A = 5x years
Age of B = 6x years
According to the question,
(5x + 15):(6x + 15) = 8:9
45x + 135 = 48x + 120
x = 5
Present age of A = 5 × 5 + 6 = 31 years
Present age of B = 6 × 5 + 6 = 36 years
Required difference = 36 – 31 = 5 years
______ is an important metal to form amalgam.
The S.I. unit of the electric flux is
Which of the following is the time taken for one complete oscillation of a sound wave in the density of the medium?
Which function is performed by rectifiers?
Which of the following circuit elements is used to 'block' DC in an electronic circuit?
What is the SI unit for measuring electric current?
In a coil with n turns, what happens to the induced electromotive force (EMF) if the number of turns is doubled while the magnetic flux remains constant?
The hormone related to drought tolerance is-
Which of the following types of waves has the smallest wavelength?
The amplitude of the sound wave depends on the
