2.B completed 1/3 of the sum of A and C, and A completed 2/5 of the total task, so B completed 2/5 * 1/3 = 2/ 15 and 1/3 of C. Take the total task as "/kloc-0". The rest is 1/3 of the total tasks completed by C and B, and the rest is 1-2/5-2/ 15 = 7/.

Since this 7/ 15 is 1/3 of C jointly completed by C and B, C is regarded as the unit "1", and thus (7/ 15)/( 1+0/3) = 7 of the total task of C.

It is known that B produces 60 less than C, so the total number of parts is 60/(7/20- 1/4) = 600, and A has finished 600 * 2/5 = 240.

P40

1. Take the whole cloth as the unit "1", then you need115 cloth to make a coat,110 cloth to make a pair of trousers, and10 to make a suit.