Question
At present, Rahul and Rajat have ages in a 7:5 ratio.
Anirudh age is 3 years less than Rahul and Sneha age is 5 years more than Rajat If the average current age of Sneha, Anirudh, Rahul and Rajat is 24 years and six months, what is the ratio of Rajat age to Sneha age?Solution
ATQ, Let the present ages of Rahul and Rajat be 7x years and 5x years, respectively. So, the present age of Anirudh = 7x – 3 years Present age of Sneha = 5x + 5 years According to question: 7x + 5x + 7x – 3 + 5x + 5 = 4 × 24.5 24x + 2 = 98 24x = 96 x = 4 So, the present ages of Sneha, Anirudh, Rahul and Rajat are 25 years, 25 years, 28 years and 20 years respectively. So, the desired ratio = 20:25 = 4:5
A robot can finish a task as quickly as two humans, 'E' and 'F', together. If human 'E' can finish the task in 8 hours and human 'F' in 24 hours, how lo...
Three men and 4 women can do a piece of work in 7 days, whereas 2 men and I woman can do it in 14 days. Seven women will complete the same work in:
Average speed of ‘A’ during a 22-hour journey is 22 km/h. If he covered the first 280 km of his journey at a speed of 20 km/h, then find the speed a...
A and B together can do a piece of work in 30 days, B and C together can do it in 20 days. A starts the work and works on it for 5 days, then B takes it...
‘A’ and ‘B’ alone can do a certain work in 30 days and 40 days, respectively. Both started the work together but after ‘x’ days ‘A’ left...
The efficiency of A is half than that of B and C together. The ratio of the efficiency of B and C is 5 : 4. A, B and C together can do this work in 12 d...
Sneha and Meena can complete a project in 24 days and 60 days respectively. Sneha began working first. After how many days should Meena step in so that ...
28 men can complete a work in 20 days. 40 women can complete the same work in 28 days. 20 men and 12 women started working and after 16 days, 20 more wo...
A alone can complete 50% of a work in 9 days while B takes 6 days more than A to complete it. If B and C together can complete the work in 12 days, then...
'A', 'B' and 'C', alone can do some work in 15 days, 18 days and 30 days, respectively. If they work together for wages of Rs. 9,800, then find the dif...
Relevant for Exams:
