Sir jee you should tag, other wise i dont get any notification, i dont visit often.
So i reckon its rear tube.... Well i had the same exact case in Summer 2013, when we were coming back from Kumrat valley with IJC group, our tube broke on our way back.... from same side 
Welll the best option Find a shell its i thnk 52" or may be 50" so many sizes came in pajero..... Mine was 52", so the best solution is replace it, there is no other way..... even if you weld it it wont last long, as the rear tube has so much as compare to front one....