Question
The respective ratio of monthly income of A to monthly
income of B is 12:13, and A’s saving is (100/19)% more than B’s saving. Find the expenditure of A, if the sum of monthly income of A and B is Rs. 50000, and expenditure of B is Rs. 7000.Solution
Let monthly income of A and B be 12x and 13x, respectively. Then, 12x + 13x = 50000 25x = 50000, x = 2000 A’s monthly income = 12x = Rs. 24000 B’s monthly income = 13x = Rs. 26000 Given, expenditure of B = Rs. 7000 So, B’s saving = 26000 – 7000 = Rs. 19000 Then, A’s saving = 19000 + (1/19) × 19000 = 19000 + 1000 = Rs. 20000 A’s expenditure = 24000 – 20000 = Rs. 4000
A boat running downstream covers a distance of 55 km in 5 hrs and covering the same distance upstream in 11 hrs. What is the speed of a boat in still wa...
The duration needed to travel (x – 36) km upstream equals the time taken to go (2x – 72) km downstream. If the boat’s speed is 10.5 km/h and the c...
Find the total distance covered by boat in each upstream and downstream in 6 hours if the speed of boat in still water and speed of current is 15 km/h a...
The speed of the boat in still water is 10 km/hr and the speed of the stream is 5 km/hr. A boat goes 75 km downstream with its usual speed but at the ti...
A swimmer can swim at a speed of 3.5 kilometers per hour in still water. If the time taken to cover a certain distance upstream is 2.5 times the time ta...
A boat covers 13 km upstream in 52 min. If the speed of the current is 6 km / h, then in how much time will it cover 40 km downstream?
A man can row boat at 9 kmph in still water. If the velocity of the current is 6 kmph and he takes 2 hour to row to a place and come back, how far is th...
A man rows to a place 42 km away and comes back to the starting point. If the speed of the stream is 2 km/hr and the speed of the boat in still water is...
A boat moves upstream at 18 km/hr. If it covers 270 km downstream in 5 hours, determine the speed of the current.
Speed of a boat in still water is 12 kmph and speed of stream is 9 kmph. A man rows to a place at a distance of 63 km and come back to starting point. T...