Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
worth [wəːθ] n (value) сто́имость f
adj
to be worth сто́ить (impf)
how much is it worth? ско́лько э́то сто́ит?
50 pence worth of apples я́блок на 50 пе́нсов
an hour's worth of work рабо́та на час
it's worth it э́то того́ сто́ит
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.