If 3 men or 4 women can reap a field in 43 days. How long will 7 men and 5 women take to reap it?

A milkman makes 20% profit by selling milk mixed with water at Rs.9 per liter. If the cost price of 1 liter pure milk is Rs.10, then the ratio of milk and water in the said mixture is?

In what ratio must 25% alcohol be mixed with 50% alcohol to get a mixture of 40% alcohol strength ?

How many ml. of water must be added to 48 ml. of alcohol to make a solution that contains 25% alcohol ?

A mixture of 70 litres contains milk and water in ratio of 3 :4. How many litres of milk must be added to mixture so as to make the ratio 5 : 4?

The population of a town is 10000. In a particular year, male population is increased by 5% and female population by 8%. If the population at the end of year is 10590. What was the male population in the town in beginning of the year?

Find the ratio in which rice at  Rs 7.20 a kilogram be mixed with rice at Rs 5.70 a kilogram to produce a mixture of worth  Rs 6.30 a kilogram.

The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected  new mean is?

A mixture of 70 litres of wine and water contains 10% of water. How much more water should be added to make the water  of the resulting mixture ?

729 litres of a mixture contains milk and water in the ratio 7:2. How much water is to be added to get an new mixture containing milk & water in the ratio 7 : 3?