Question

A machine produces 2520 pens in a day.How many pens will it produce in the month of may?

Answer 1

1day =2520
may=31days
31days =?

31 ✖ 2520
=78120
so in May machine will produce 78120 pens

Answer 2

in a day=2520
in a month=2520×31
=78120