Question
A boat travels downstream at a speed that is (13/12)
times its speed in still water. If the boat takes 3 hours to cover 132 km going upstream, how long will it take to travel 208 km downstream?Solution
Let the downstream speed of the boat and speed of the boat in still water be 13x km/hr and 12x km/hr, respectively Therefore, speed of the stream = downstream speed - speed of boat in still water Or, speed of stream = 13x - 12x = 'x' km/hr And, upstream speed of the boat = 12x - x = 11x km/hr Or, 11x = 44 Or, 'x' = 4 So, downstream speed of the boat = 13x = 13 X 4 = 52 km/hr Required time = 208 ÷ 52 = 4 hours
M and N started a business by investing Rs.5000 and Rs.6000 respectively. After 7 months, M and N increased their investments by 60% and Rs.2100 respect...
‘A’ invested Rs. 2400 for ‘x’ months while ‘B’ invested Rs. 400 less amount than ‘A’ for (x + 4) months....
X and Y invested Rs. 2800 and Rs. 4200 respectively into a business. After 3 months, Z joined them with an investment of Rs. ‘x’. If the share of X ...
In a business there are two partners ‘P’ and ‘Q’. ‘P’ started the business with the capital of Rs. 24000 and after 3 months ‘Q’ joined h...
A, B and C hired a taxi for Rs. 850 and used it for 4, 6, 7 hours respectively. Hiring charges paid by B are:
A, B and C started a business with initial investments in the ratio 3:4:8, respectively. After one year A, B and C made additional investments equal to ...
P started a business with an investment of Rs.10000, after 6 months Q joined him with Rs.12000 and after another 6 months R joined them with Rs.15000. I...
If a sum of money is to be divided among A, B, C such that A’s share is equal to thrice B’s share and B’s share is 8 times C’s share then their ...
Priya and Arjun put in Rs. 2800 and Rs. 4200 respectively. They split 50% of the profit equally and distribute the rest according to their investments. ...
P started a business investing Rs.9000. After 3 months, Q joined her with the capital of Rs.12000. After another 6 months, R joined them with the capita...
Relevant for Exams:
