Question
Seven years ago from now, the ratio of ages of Om and
Jai was 3:4, respectively. Six years hence from now, the ratio of ages of Veer and Jai will be 4:5, respectively. If Veer is 2 years younger than Om, then find the age of Om, 'a' years hence from now, where 'a' is the smallest two-digit prime number.Solution
Let the ages of Om and Jai 7 years ago be 3x years and 4x years, respectively. Age of Veer 7 years ago = 3xβ2 years Age of Om now = 3x+7 Age of Jai now = 4x+7 Six years hence: Age of Om = 3x+7+6=3x+13 Age of Jai = 4x+7+6=4x+13 Age of Veer = 3x+13β2=3x+11 Given: Solving the equation: 5Γ(3x+11)=4Γ(4x+13) 15x+55=16x+52 16xβ15x=55β52 x=3 Since 11 is the smallest two-digit prime number: Age of Om, 11 years hence = 3x+7+11=3Γ3+7+11=27 years.
Electrical fuse is used to interrupt excess of _________.
Which of the following statements best describes the relationship between static friction and the normal force?
Which Nobel Gas is also known as βStranger Gasβ?
The S.I. unit of the electric flux is
What type of image is always formed by a convex mirror?
The motion of a freely falling body is an example of ______________ accelerated motion.
Which of the following Instrument is used to measure humidity?
The Atom Bomb dropped in Nagasaki is an uncontrolled nuclear fission made up of:
The instrument which uses sound waves to measure the depth of oceans is β
Mercalli scale is the instrument used for measuring the intensity of ___________.