Advertisements
Advertisements
प्रश्न
A sum of Rs 800 is in the form of denominations of Rs 10 and Rs 20. If the total number of notes be 50, find the number of notes of each type.
उत्तर
Let the number of Rs . 10 notes be x.
Therefore, the number of Rs . 20 notes will be (50 - x) .
Value of Rs . 10 notes = 10x
Value of Rs . 20 notes = 20(50 - x)
According to the question,
\[10x + 20(50 - x) = 800\]
or 10x + 1000 - 20x = 800
or 10x = 1000 - 800
or \[ x = \frac{200}{10} = 20\]
∴ Number of Rs . 10 notes = 20
Number of Rs . 20 notes = (50 - 20) = 30 .
APPEARS IN
संबंधित प्रश्न
The denominator of a rational number is greater than its numerator by 8. If the numerator is increased by 17 and the denominator is decreased by 1, the number obtained is `3/2` . Find the rational number.
The difference between the squares of two consecutive numbers is 31. Find the numbers.
Find a number such that when 5 is subtracted from 5 times the number, the result is 4 more than twice the number.
Divide 184 into two parts such that one-third of one part may exceed one-seventh of another part by 8.
Seeta Devi has Rs 9 in fifty-paise and twenty five-paise coins. She has twice as many twenty-five paise coins as she has fifty-paise coins. How many coins of each kind does she have?
A steamer goes downstream from one point to another in 9 hours. It covers the same distance upstream in 10 hours. If the speed of the stream be 1 km/hr, find the speed of the steamer in still water and the distance between the ports.
The length of a rectangle exceeds its breadth by 9 cm. If length and breadth are each increased by 3 cm, the area of the new rectangle will be 84 cm2 more than that of the given rectangle. Find the length and breath of the given rectangle.
If `x/11 = 15`, then `x = 11/15`
Solve the following:
`(5x)/(2x - 1) = 2`
If numerator is 2 less than denominator of a rational number and when 1 is subtracted from numerator and denominator both, the rational number in its simplest form is `1/2`. What is the rational number?
