Question
Mixture βXβ contains 50% alcohol and the rest 40
litres of water. 150 litres of mixture βYβ contains alcohol and water in the ratio 5:10, respectively. Find the resultant ratio of alcohol to water when these two mixtures are mixed.Solution
ATQ, Quantity of alcohol in mixture βXβ = 40 Γ (0.5/0.5) = 40 litres Quantity of alcohol in mixture βYβ = 150 Γ (5/15) = 50 litres Quantity of water in mixture βYβ = 150 β 50 = 100 litres Total quantity of alcohol in resultant mixture = 40 + 50 = 90 litres Total quantity of water in resultant mixture = 40 + 100 = 140 litres Required ratio = 90:140 = 9:14
The population of a village increase at the rate of 10% during the first year and decreases at the rate of 20% during the second year. If it has 20240 i...
A school's enrollment of students increased by 10% in 2015, another 20% in 2016, and then decreased by 30% in 2017. If the percentage of students receiv...
A bowl contains a colony of bacteria. Every hour, the bacteria population doubles, but immediately after doubling, a virus kills 40% of the population. ...
Ratio of males to females in city A is 2:3 and ratio of males to females in city B is 14:25. Number of males in city B are (x+10)% more than number of m...
A candidate who gets 24% marks fails by 8 marks but another candidate who gets 40% marks gets 12% more than the passing marks. Find the maximum marks.
Meenu spent 30% of the salary on entertainment and 10% on makeup. She spent 10% of the remaining on the food and 50% of the remaining invested in mutual...
The respective ratio of monthly income of A to monthly income of B is 6:7, and Aβs saving is (100/7)% more than Bβs saving. Find the expenditure of ...
Meenu spent 30% of the salary on entertainment and 10% on makeup. She spent 10% of the remaining on the food and 50% of the remaining invested in mutual...
If the price of an essential good rises by 18% and the consumer decreases his consumption by 12%, what will be the percentage change in the expenditure?
Alloy A contains copper and zinc in the ratio 4:5 and alloy B contains copper and zinc in the ratio 7:2. A and B are taken in the ratio 7:4 and melted t...