NumericalModerate2 marks
4(iii)
If (a + b)³ / (a - b)³ = 64 / 27
Hence using properties of proportion, find a : b.
Topic: Ratio and proportion
Previous-year question practice database
Answer
Exam answer
a : b = 7 : 1
Explanation
3(a+b)=4(a−b) ⇒ 3a+3b=4a−4b ⇒ a=7b.
More from Ratio and Proportion (Including Properties and Uses)
(x + 3), 1, (3x − 7) and −5 are in proportion. The value of x is :2026Using properties of proportion, find the value of 'x':
(6x² + 3x - 5) / (3x - 5) = (9x² + 2x + 5) / (2x + 5) ; x ≠ 02025The given table shows the distance covered and the time taken by a train moving at a uniform speed along a straight track.
The values of x and y are :2024find (a + b) / (a - b)2024The mean proportional between 4 and 9 is :2023What number must be added to each of the number 4, 6, 8, 11 in order to get the four numbers in proportion ?2023