Advertisements
Advertisements
प्रश्न
The monthly pocket money of Ravi and Sanjeev are in the ratio 5 : 7. Their expenditures are in the ratio 3 : 5. If each saves Rs. 80 every month, find their monthly pocket money.
उत्तर
Let the monthly pocket money of Ravi and Sanjeev be 5x and 7x respectively.
Also, let their expenditure be 3y and 5y respectively.
So, 5x – 3y = 80 ...(i)
And 7x – 5y = 80 ...(ii)
Multiplying (i) by 7 and (ii) by 5 and subtracting, we get
35x – 21y = 560
35x – 25y = 400
– + –
4y = 160
⇒ y = 40
From (i),
5x = 80 + 3 × 40 = 200
⇒ x = 40
So, monthly pocket money of Ravi
= ₹ 5 × 40
= ₹ 200
And monthly pocket money of Sanjeev
= ₹ 7 × 40
= ₹ 280
संबंधित प्रश्न
Find the compound ratio of `sqrt(2) : 1, 3: sqrt(5)` and `sqrt(20) : 9`
What quantity must be added to each term of the ratio 19 : 51 to make it equal to 3 : 7 ?
The monthly salary of a person is Rs. 12,000 and his monthly expenditure is Rs 8,500. Find the ratio of his:
(i) salary to expenditure
(ii) expenditure to savings
(ii) savings to salary
In a club has 360 members, 40 play carrom, 96 play table tennis, 144 play badminton, and remaining members play volley-ball. If no member plays two or more games, find the ratio of members who play:
(i) carrom to the number of those who play badminton.
(ii) badminton to the number of those who play table-tennis.
(iii) table-tennis to the number of those who play volley-ball.
(iv) volleyball to the number of those who play other games.
A school collected Rs 2100 for charity. It was decided to divide the money between an orphanage and a blind school in the ratio of 3 : 4. How much money did each receive?
Find the ratio of the price of a pencil to that of a ball pen if pencils cost Rs 96 per score and ball pens cost Rs 50.40 per dozen.
A bus covers 128 km in 2 hours and a train covers 240 km in 3 hours. Find the ratio of their speeds.
Ratio of 5 paise to 25 paise is the same as the ratio of 20 paise to ______.
There are 20 girls and 15 boys in a class. What is the ratio of number of girls to the total number of students in the class?
Find the ratio of the following:
500 mL to 2 litres
