Question

Question #5035b

Answer 1

if 1000 calories are given in a minute and since it's efficiency is 20%, the work the steam engine does during a minute `= 1000*20/100`

`=200 cal`

but `1 cal = 4.184J`
if they have given a value for 1 calorie in joules, then use that.

so the work done in joules `=200* 4.184`
`=8.368J`

i guess the closest answer is `2)`