Solving the Puzzle: Calculating Acceleration of Blocks

[anigeo]

Homework Statement

in the given diagram all the stings and pulley are mass-less ad there is no friction calculate the magnitude of acceleration of the two blocks?

Homework Equations

The Attempt at a Solution

the acceleration of the blocks is obtained by me to be g/20 but the answer is g/10.my attempt at the problem is given on the other image. i have vied hard for it , so please help me.

 

[ehild]

g/10 is the correct answer. You must have done something wrong, but we can not help unless you show your work. ehild