Question
A boat can travel 15 km upstream and 21 km downstream in
3 hours. Find the speed of the boat in still water if the speed of the stream is 1.5 km/h.Solution
Let the speed of the boat in still water be ‘x’ km/h. Upstream speed = ‘x – 1.5’ km/h Downstream speed = ‘x + 1.5’ km/h According to the question: 
Thus, the speed of the boat in still water is 12.5 km/h .
'Anoop' and 'Bheem' started a business with investments of Rs. 3250 and Rs. 3750, respectively. Four months into the business, 'Chitra' joined them with...
Akash invested some money in a venture for a period of 5 months. After 3 months of his investing, Brijesh invested some amount such that the ratio of in...
- P and Q started a business by investing Rs. 24000 and Rs. 30000, respectively. After 4 months, R also joined them by investing Rs. 36000. If the annual pro...
Seeta, Geeta and Reeta invested Rs. 8000, Rs. 10000 and Rs. 12000 respectively. Partnership condition is that, each will get interest on his capital at ...
- Maya and Neha started a business with Rs. 24,000 and Rs. 18,000. After 6 months, Maya added Rs. 6,000 more, and Sara came in with Rs. 30,000. If the profit...
A and B invested Rs.5000 and Rs.9000 in a business respectively and after 4 months B withdrawn 50% of his initial investment and again after 5 months he...
‘A’ started a business by investing Rs. 1,200. Eight months later, ‘B’ joined him by making an investment which is equal to 60% of the investmen...
‘X’ and ‘Y’ started a business together. The amount invested by ‘X’ is 40% more than that of ‘Y’, while ‘Y’ invested his amount for ...
A, B and C invest in a business, A invests twice as compared to B and C invests 90% more than A's investment, if all invest for same time duration, then...
- Shyam and Tarun invested Rs. 1800 and Rs. 2700 respectively in a business. After 6 months, Dinesh joined with Rs. ‘x’. If Shyam’s share from a total ...
Relevant for Exams:
