Answer :
The machine can produce 22 400 copies in 7 hours.
In 7 hours 22 400 copies were produced.
In 1 hour 22 4000/ 7 would be produced.
Therefore in 21 hours (22 400 / 7) * 21 will be produced.
Solving this = 22 400 * 3.
= 67 200 copies.
In 7 hours 22 400 copies were produced.
In 1 hour 22 4000/ 7 would be produced.
Therefore in 21 hours (22 400 / 7) * 21 will be produced.
Solving this = 22 400 * 3.
= 67 200 copies.
