Question

30 (in)(cm2)/(yr)(s)(lbm)(ft2) to all SI units.

(a) 5.72×10-11

(b) 4.76×10-12

(c) 8.73×10-11

(d) 4.45×10-12

I have been asked this question in exam.

This intriguing question comes from Conversion of Units-I topic in division Introductory Concepts of Chemical Process Calculation

Answer 1

The correct answer is (a) 5.72×10-11

To explain: 1 lbm  = 454 g,  1 ft = 12×2054 centimetres and 1yr = 365×24×60×60 sec.