Question

http://prntscr.com/6wmr3b

Answer 1

hmm how many seconds in 1hr though?

Answer 2

60 in mins

Answer 3

well.. 60 mins
and each minute is 60 seconds

thus one hour has (60 * 60) seconds or 3600 seconds
so he can read 1 page in 40 secs
how many in 3600 seconds? well \(\large {
\begin{array}{ccllll}
secs&pages
\\\hline\\
40&1\\
3600&x
\end{array}\implies \cfrac{40}{3600}=\cfrac{1}{x}\impliedby \textit{solve for "x"}
}\)

Answer 4

can you brok that down please

Answer 5

tis just a matter of just cross-multiplying

Answer 6

@Ilovecake

Answer 7

@ILUVSOCCER

Answer 8

don't know how to cross multiply ??

Answer 9

no i forgot

Answer 10

now try