Question
P got married 8 years ago. His present age is 5/3 times
his age at the time of his marriage. P’s sister was 10 years younger to him at the time of his marriage. The present age of P’s sister is:Solution
Let P age at the time of his marriage 8 years ago be 3x. His present age be = (5/3) × 3x = 5x According to question, => 5x – 3x = 8 => x = 4 years Now P age at the time of his marriage 8 years ago = 3x = 3 × 4 = 12 years And his present age = 5x = 5 × 4 = 20 years P’s sister age 8 years ago = 12 – 10 = 2 years So, present age of P’s sister = 2 + 8 = 10 years
Which of the following is an example of symbiosis?
What is the product of the reaction?
CH₃COOH + CH₃OH → (H⁺, heat)
In a nuclear reactor, one of the following is used as a fuel.
1 mole of carbon atoms = ______ g of carbon atoms
Two capacitors of capacitance 6 µF and 3 µF are connected in series across a battery of constant voltage.
The charges stored on the two capaci...
Group number and valency have no relation in
In Bohr’s model of the hydrogen atom, electrons in “stationary” orbits do not emit radiation continuously because:
The primary reason that smoking cigarettes is bad for our health is that cigarette smoke _______.
Chemical equation is balanced according to the law of
Consider the following statements regarding antibiotics
1. They are used to destroy disease-causing bacteria.
2. They can be applied to th...
