Question
P and Q can complete a piece of work individually in 12
days and 20 days, respectively. They start working together, but after 6 days, Q leaves the work. P continues and completes the remaining work alone. How many total days did it take to finish the entire work?Solution
Let total work = 60 units (LCM of 12 and 20)
Efficiency of 'P' = (60/12) = 5 units/day
Efficiency of 'Q' = (60/20) = 3 units/day
Amount of work completed by 'P' and 'Q' together in 6 days = 6 X (5 + 3) = 48 units
Remaining work = 60 - 48 = 12 units
Time taken by 'P' to complete the remaining work = (12/5) = 2.4 days
Required time taken = 6 + 2.4 = 8.4 days
'B' distributes 65% of his total earnings among his father, mother, and sister in the ratio of 5:4:3. If his sister's share is Rs. 1,950, what is B's to...
Income of ‘Rohan’ is Rs. 45000 which is 10% less than that of ‘Sohan’. ‘Sohan’ spends 50% of his income and saves the rest. The ratio of sav...
A Motorbike can be purchased on cash payment of Rs. 30000. But the same Motorbike can also be purchased on the cash down payment of Rs 7000 and the rest...
- ‘P’ earns Rs. 48000 which is 25% less than what ‘Q’ earns. ‘Q’ spends 50% of his income and saves the rest. If the ratio of savings of ‘P’ ...
- The average income of Tania, Sweta and Priya is Rs. 360. Sweta earns Rs. 30 more than Priya and Tania earns four times what Priya earns. Find Sweta’s inc...
The income of 'E' is Rs. 50,000 while the income of 'F' is 20% more than that of 'E'. The ratio of expenditure and savings of 'E' is 2:3, respectively. ...
Satyam and Aman have monthly salaries, including savings and expenditure, in the ratio 8:11. Aman's monthly savings are Rs. 12,000, and Satyam's savings...
- The salary of a person is increased by Rs. 500. If his old salary was 25% less than his new salary, then his old salary was:
A man invests ₹15,000 in a business. In the second year, he increases his investment by 20%, and in the third year, he reduces it by 25% of the second...
- The income of Kavita is (50/2)% more than the income of Sneha. How much percent less is Sneha’s income compared to Kavita’s?