If A : B = 3 : 5; B : C = 4 : 7. Find A : B : C ?

If 3p = 5q, then what is p : q ?

If 21 cows eat equal to 15 oxen, how many cows will eat equal to 25 oxen?

The length of a rectangle is 2 cms more than its width. If the perimeter is 36 cms., then the area is

The exponent in (2ab) ^-2.6 is

Find x, if 25 : x = x : 4