u : v = 4 : 7 and v : w = 9 : 7. If u = 72, then what is the value of w?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 98
u : v = 4 : 7........(× 9)
v : w = 9 : 7.......(× 7)
u : v : w = 36 : 63 : 49
If u = 72 (Given)
36x = 72 ; x = 2 then,
w = 49x
w = 49 × 2 = 98