Advertisements
Advertisements
प्रश्न
The ratio of the pocket money saved by a boy and his sister is 5:4. If the brother saves Rs 100 more, how much more should the sister save in order to keep the ratio of their savings unchanged ?
उत्तर
Let money saved by the boy and her sister be Sx and 4x and let the sister need to save Rs y more
`(5"x" + 100)/(4"x" + "y") = 5/4`
⇒ 20x + 400 = 20x + 5y
⇒ 5y = 400
⇒ y = 80
The sister needs to save Rs 80 more.
APPEARS IN
संबंधित प्रश्न
Two positive numbers are in the ratio 3 : 5 and the difference between their squares is 400. Find the numbers.
Find the triplicate ratio of the following :
`root (3)("ab"^2) : root (3)("a"^2"b")`
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.
If p + r = 2q and `(1)/q + (1)/s = (2)/r`, then prove that p : q = r : s.
Rs. 720 is divided between x and y in the ratio 4:5. How many rupees will each get?
Show that 2, 12 and 72 are in continued proportion.
If `(2"y"+5"x")/(3"y"-5"x")=2 1/2`, find x : y
If (3x + 1) : (5x + 3) is the triplicate ratio of 3 : 4, find the value of x.
The ratio of the number of boys to the number of girls in a school of 560 pupils is 5 : 3. If 10 new boys are admitted, find how many new girls may be admitted so that the ratio of the number of boys to the number of girls may change to 3 : 2.
The marked price of a table is Rs. 625 and its sale price is Rs. 500. What is the ratio of the sale price to the marked price?
