Advertisements
Advertisements
प्रश्न
The work done by (x – 3) men in (2x + 1) days and the work done by (2x + 1) men in (x + 4) days are in the ratio of 3: 10. Find the value of x.
Advertisements
उत्तर
(x - 3) men do a work in (2x + 1) day
∴ 1 man does it in (2x + 1) (x - 3) days
(2x + 1) men do a work in (x + 4) days
∴ 1 man does it in (x + 4) (2x + 1) days
∴ `((2x + 1) (x - 3))/((x + 4) (2x + 1)) = (3)/(10)`
`(x - 3)/(x + 4) = (3)/(10)`
10x - 30 = 3x + 12
10 -3x = 12 + 30
7x = 42
x = `(42)/(7)`
x = 6.
संबंधित प्रश्न
Find sub-duplicate ratio of (x – y)4 : (x + y)6
Find the sub-duplicate ratio of the following :
`(9"a"^2)/5 : (25"a"^2)/3`
Divide a number into two parts in the ratio 5:7 so that smaller part is 60. Find the number.
In an examination the ratio of the number of suo:essful candidates to unsuccessful candidates is 7:5. Had 30 more appeared and 10 more passed, the ratio of successful candidates to unsuccessful candidates would have been 4:3. Find the number of candidates who appeared in the examination originally.
Three persons start a business and spend Rs. 25,000; Rs. 15,000 atid Rs. 40,000 respectively. Find the share of each out of a profit of Rs. 14,400 in a year
Find the following ratio in the simplest form:
48 minutes to 1 hour
The ratio of income to the expenditure of a family is 7 : 6. Find the savings if the income is Rs 14000.
Find the value of x when 36 : x : : x : 16.
A train takes 2 hours to travel from Ajmer to Jaipur, which are 130 km apart. How much time will it take to travel from Delhi to Bhopal which are 780 km apart if the train is travelling at the uniform speed?
The yield of wheat from 8 hectares of land is 360 quintals. Find the number of hectares of land required for a yield of 540 quintals?
