How many seconds are there in 2 days?

Answer

A, B

Explanation

Unit factor : `1 = (24 h)/(1 day)`
1 hr = 60 min
unit factor : 1 `=(60 "min")/(1 hr)`
1 min = 60 s
Unit factor : 1 `=(60 s)/(1 min)`
`therefore 2` days = 2 day `xx (24 h)/(1 day) xx (60 min)/(1 h) xx (60 s)/(1 min)`
= 172800 s