Question
A boat can travel 24 km upstream and 30 km downstream in
4 hours. Find the speed of the boat in still water if the speed of the stream is 3 km/h.Solution
ATQ, Let the speed of the boat in still water be ‘x’ km/h. Upstream speed = ‘x – 3’ km/h Downstream speed = ‘x + 3’ km/h According to the question: 
Thus, the speed of the boat in still water is 14 km/h .
'A' and 'B' started a business with initial investments in the ratio 4:7. After six months, 'C' joined the business with an investment of Rs. 4,000. At ...
Aman, Bhanu, and Chikku jointly initiated a business with a total investment of Rs. 80,000, of which Aman invested Rs. 24,000. After 6 months, Aman adde...
'X' invested Rs. 32,000 to start a business. After 4 months, 'Y' joined with Rs. 48,000. 'X', being an active partner, received 25% of the total annual ...
- Manoj and Mahesh invested Rs. 6,000 and Rs. 9,000 respectively in a venture. Mahesh withdrew after a few months. At the end of the year, profit was divided...
A and B invested Rs.3000 and Rs.6000 in a business respectively and after 5 months B withdrawn 50% of his initial investment and again after 5 months he...
A and B enter into a partnership with their initial sum of Rs.30000 and Rs.48000 respectively. After 6 months, a third person C also joins them with his...
Makhan Lal started a business with the capital investing Rs 18,400. After 6 months Arvind Lal invested Rs 16200. At the end of one year they made a prof...
X and Y enter into a partnership with capital in the ratio 3: 5. After 5 months X adds 50% of his capital, while Y withdraws 60% of his capital. What is...
- ‘C’ and ‘D’ jointly started a business. ‘C’ invested an amount which was 20% more than ‘D’. However, ‘D’ invested his capital for 10% l...
J, K and L enter into partnership with capital contributions of Rs 30,000, Rs 45,000 and 25,000 respectively. J is the working partner and he gets 30% o...
