If $$ {a\over 3}={b\over3}={c\over4}$$ then find the value of $$ {a+b+c\over c}$$.

If A: B = 4:5 and B:C= 3: 7 . What is the value of C:A?

If X: Y = 4: 3 and Y: Z = 5: 3. If X+Y+Z = 1584. Find X?

The ratio of the length of the parallel sides of a trapezium is 3: 2. The shortest distance between them is 15 cm. If the area of the trapezium is 450 cm.2, the semi-sum of the length of the parallel sides is

The sum of squares of three numbers is 532. And the ratio of first to the second as also of the second to the third is 3:2. What is the second number?

In two types of brass ratio of copper and zinc are 8: 3 and 15: 7 respectively. The ratio in which these two types of brass should be mixed, so that the ratio of copper and zinc in this new type of brass become 5: 2 is 

If u : v= 4 : 7 ,  v : w = 9 : 7 and u=72 then find the value of w.

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