If x ∶ y = 3 ∶ 2 and x + y = 90, then the value (x – y) is :
A) 12 B) 18 C) 16 D) 10 Given data x : y = 3 : 2 x + y = 90 Detailed solving: Let assume the value as 3a and 2a x + y = 3a + 2a ⇒ 3a + 2a = 90 ⇒ 5a = 90 ⇒ a = 18 ⇒ x … Read more
ratio and proportion
The incomes of two persons P and Q are in the ratio 5 ∶ 6. If each of them saves Rs.200 per month, the ratio of their expenditures is 3 ∶ 4. Find the income of Q.
A) 750 B) 800 C) 600 D) 740 Detailed solution Let two persons be P and Q 5. :. 6. Income of two person 3. :. 4 expenditure For Q If income is 6 and expenditure is 4 remaining will be his saving which is 2 But in question they are given it as 200 … Read more
The ratio of tables and chairs in a room is 7 : 9. If there are 560 tables and chairs in the room, then what is the number of chairs ?
A) 397 B) 315 C) 453 D) 489 SOLUTION Tables Chairs 7. 9 As per question totally they are 560 So 7 +9 = 16 16 represents the total 560 560/16 = 35 In question asked for number of chairs 35 x 9 = 315 Answer 315
The sum of three numbers is 280. If the ratio between the first and second number is 2:3 and the ratio between second and third number is 4:5, then find the second number.
let three numbers be X Y Z sum of three numbers as per question X+Y+Z = 280 X Y Z 2 : 3 : 3 4 : 4 : 5 8 : 12 : 15 sum of three numbers as per question 8+12+15 = 35 MEANS 35 represents 280 1 represents 280/35= 8 in question … Read more
94 is divided into two parts in such a way that the fifth part of the first and eight part of the second are in the ratio of 3:4 find the value of first part.
94 is divided into two parts in such a way that the fifth part of the first and eight part of the second are in the ratio of 3:4 find the value of first part. A) 30 B) 35 C) 40 D) 45 A x 1/5 ———— = 3/4 = 15/32 B x 1/8 15————30 … Read more