A weaver has 82 1/2 m of cloth. He stitches a curtain of length 2 3/4 m with two-thirds of the cloth. With the remaining cloth he stitches 25 cushion covers. Find: (a) the number of curtains stitched. (b) length of cloth used for 1 cushion.
Its answer is :

(a) 20 curtains
(b) 11/10 meter

Pls help me I need full solution