Question
If Pawan can do a piece of work in 6 days and Mantu can
complete the same work in 2 days, then in how many days will both of them together complete the work?Solution
If Pawan can complete a piece of work in 6 days (P = 1/6) Mantu can complete the same work in 2 days (M = 1/2) Then working together, they can finish (2/3) of the work in one day (P + M = 2/3) Using the formula {time × rate of work = work done} we find that they will complete the entire work in (3/2)days or 1½ days when working together
In a mayoral election between two nominees, 20% of the total votes were rejected as invalid. Out of the valid votes, 65% went to the winning candidate, ...
In 2021, Ravi's income was Rs. 18,000, out of which he spent 35% and saved the rest. In 2022, if Ravi's income increased by 15% a...
Hari scored 70 marks in English. He scored 64% marks in Hindi and X marks in Maths. The maximum marks for each subject is 175. The overall percentage of...
A man spent 30% of his income in May. If his savings is increased by 30% in June and becomes Rs. 9100, then find the income of man in May.
- A laptop’s price increases by 7% annually. If its present price is ₹50,000, what will be the price after 2 years?
In a mixed school 25% of the scholars are infants under 7 and the number of girls above 7 is 4/5 of the number of boys above 7, and amounts to 120. Find...
A invested a certain amount in Debt and Equity mutual funds in the ratio of 3: 7 respectively. At the end of one year, he earned a total dividend of 30%...
What is the percentage change in the result when we add 36 to a certain number x, instead of subtracting 36 from the same number x?
In a school, 30% of the students are not participating in any competition. 80% of the students who are participating in the competition are girls. If 42...
Kalpana allocates 30% of her monthly income to educational expenses and spends 60% of what remains on clubbing activities. If she spends Rs. 3024 on clu...