If a : b = 2 : 3 and b : c = 4 : 5, then a : c is:

A sum of ₹6,300 is divided among A, B and C in the ratio 2 : 3 : 4. Find each share.

Using componendo and dividendo, solve (x + 2)/(x − 2) = 9/5.

If a : b = 3 : 4, find the value of (3a + 4b) : (5a − 2b).

Two numbers are in the ratio 3 : 4. If 8 is added to each, the ratio becomes 4 : 5. Find the numbers.

If x : y = 2 : 3, find (5x + 2y) : (3x − y).

If (a + b) : (b + c) : (c + a) = 6 : 7 : 8 and a + b + c = 14, find the value of c.