Question
The ratio of age of Rahul 7 years ago to the age of Neha
7 years hence is 3:4. If the average of their present ages is 35 years, what is the difference between their present ages?Solution
ATQ Let the present age of Rahul and Neha be ‘r’ years and ‘n’ years, respectively. So, (r – 7) / (n + 7) = 3 / 4 Or, 4r – 28 = 3n + 21 Or, 4r – 3n = 49 ------------------ (1) Also, r + n = 2 × 35 = 70--------------- (2) Equation (2) × 3 + Equation (1), we get 7r = 259 Or, r = 37 So, n = 70 – 37 = 33 Required difference = 37 – 33 = 4 years
Which country has emerged as India's third largest exports destination during 2022-23, after the US and UAE?
Who has received the ‘Dadasaheb Phalke Lifetime Achievement Award’ for the year 2022?
The Parliament of India exercises control over the functions of the Council of Ministers through which of the following:
I) Adjournment motion
Where was the new species of Indo-Burmese pangolin discovered?
What was the name of the treaty that was concluded between the British and the Holkar chief in 1818 following the Third Anglo-Maratha War?
Which Indian player became the first Indian to win a bronze medal at the Asian Fencing Championships 2023 in China?
Which of the following is NOT a characteristic of a zero-coupon bond?
Who among the following is the winner of the 2023 “Goldman Environmental Prize” for winning a landmark case against Formosa Plastic, one of the worl...
Where was the “Indian Mango Mania 2025” campaign launched to promote Indian mangoes?
Consider the following statements with respect to ‘The Water (Prevention and Control of Pollution) Act, 1974’:
1. The Central Pollution...
Relevant for Exams:
