Question
There are three numbers such that when the average of
any of the two numbers is added with the third number, sum obtained will be 120, 124 and 128. Find the average of all three numbers.Solution
Let the three numbers be a, b and c respectively. According to question; (a + b + 2c) = 120 × 2 = 240……………..(1) (a + 2b + c) = 124 × 2 = 248……………..(2) (2a + b + c) = 128 × 2 = 256……………..(3) From equation (1), (2) and (3) 4 × (a + b + c) = 744 a + b + c = 186 (a + b + c)/3 = 62
A simple microscope consists of :
Which of the following instruments is correctly matched with its function?
I) Voltmeter - Measures potential difference
II) Ammeter - Me...
Twinkling of the Stars is due to the phenomenon of
S.I unit of Inductance is
Water gets cooled, when ice is immersed in it. It is because of the phenomenon of
Speed of sound in air is unaffected by change in :
What is the minimum escape velocity required for a rocket to leave Earth's gravitational pull?
‘Therm' is the unit of –
Why a person can jump higher on the Moon’s surface than the Earth?
Which of the following circuit elements is used to 'block' DC in an electronic circuit?