Question
The ratio of the speed of boat ‘A’ in still water,
the speed of boat ‘B’ in still water and the speed of the current is 7:5:2, respectively. If the time taken by boat ‘A’ to travel (7D – 40) km downstream is equal to the time taken by boat ‘B’ to travel (D + 70) km upstream, then find the value of ‘D’.Solution
Let, the speeds of boat ‘A’ and boat ‘B’, in still water and the speed of the current be 7x km/hr, 5x km/hr and 2x km/hr, respectively. According to the question, (7D – 40)/(7x + 2x) = (D + 70)/(5x – 2x) Or, 21D – 120 = 9D + 630 Or, 12D = 750 Or, D = 62.5
Ratio between two numbers is 11:13 and their difference is 26. Find the sum of the given two numbers.
What number has to be added to each term of 5:6 to make the ratio 7:8?
The ratio of the first and second class fares between two railways stations is 5 : 1 and that of the number of passengers travelling by first and second...
Ratio of monthly income to monthly expenditure of A is 15:7, respectively and monthly savings of A is Rs. 2880. Find the monthly income of A.
If A:B = 3:4 and B:C = 5:7, then find the value of A:B:C.
Ratio of monthly income to monthly expenditure of A is 20:7, respectively and monthly savings of A is Rs. 3900. Find the monthly income of A.
- A total of Rs. ‘K’ was to be distributed among P, Q, and R in ratio of 7:5:6 respectively but due to some reason the money was falsely distributed in r...
The ratio of investment of A and B is 2 : 5 and that of B and C is 3 : 7. Find the investment of B if sum of investment of A, B and C is Rs. 33600.
A stone worth Rs.3800 drops and breaks with weight in the ratio 2:3:5. The price of stone is directly proportional to square of its weight. Find the tot...
The ratio of the male to female employees in the company in 2015 was 5:4, respectively. In 2016, the male employees and female employees increased by 18...
Relevant for Exams:
