If the work output of a simple machine is 40 joules in the work input it's 50 joules d percent offense efficiency is

80%

Step-by-step explanation:

1. Formula for collecting efficiency is:

(Output energy÷Input energy) x 100

2. Plug in the values:

(40J÷50J)x 100

= 80%

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

13cm

step-by-step explanation:

(apex)