find the cost 30 note books at the rate of rs 20 per dozen
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Answered by
6
50 rupees os the answer
Answered by
13
dozen means 12 books
so,
12books=20rs
30books=?
let the cost of 30 books be x
cross multiply
we get,
30*20=12*x
30*20/12=x
600/12=x
50=x
therefore the cost of 30 books is R.s 50
so,
12books=20rs
30books=?
let the cost of 30 books be x
cross multiply
we get,
30*20=12*x
30*20/12=x
600/12=x
50=x
therefore the cost of 30 books is R.s 50
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