Let the speed of boat in still water and speed of stream be 'v' and 'x' km/h respectively. ATQ, x:(v - x) = 1:9 Or, 9x = v - x Or, 'v' = 10x -------- (I) Downstream speed = v + x = 10x + x = '11x' km/h So, 11x = (82.5/2.5) Or, 11x = 33 So, 'x' = 3 On putting value of 'x' in equation (I) , We get, 'v' = 10 X 3 = 30 Therefore, required time = (54/30) = 1.8 hours = 1.8 X 60 = 108 minutes
The ratio of the monthly salary of Supriya to that of Mohini is 3 : 5. Supriya and Mohini both save 30% and 42% respectively of their monthly salaries r...
The sum of three numbers is 324. If the ratio of the first to the second is 4:5 and that of second to the third is 7:9 then the second number is?
Gold, Silver and Bronze invested money in the ratio of 1/2:1/3:1/4 in a business. After 4 months, Gold doubled his investment and after 6 months, Silver...
A sum of money is divided among P, Q, R and S in the ratio of 5:6:10:11 respectively. If the share of R's is Rs. 2440 more than the share of Q, then wha...
Three numbers are in ratio 4:5:7. If the sum of the squares of those three numbers is 360 then find the sum of the three numbers.
Rs.10800 was divided among A, B and C in the ratio 2:3:4. B kept Rs.1200 for himself, gave Rs.800 to his mother and divided the remaining money among hi...
A sum of Rs.2400 is distributed among A, B, C in the ratio of 3:7:10. What is the total amount received by A and B?
A plot has to be divided among P, Q and R in the ratio 3:5:7 respectively. If the area of plot received by R is 4200m² more than the area of plot recei...
A bag contains coins of Rs 1, 50p, and 25p and the ratio of the number of coins is 6:15:16. If the total value of all the coins is Rs 1050 then what wi...
A sum of money is divided among P, Q, R and S in the ratio of 1:2:5:6 respectively. If the share of R's is Rs. 2850 more than the share of Q, then what ...
