Question

To see how fast the moss was growing students recorded how long it took the moss to cover a rule. After one hour, the moss had covered 1 1/8 inches of the ruler. After two hours, it had covered another 1 1/3 inches of the ruler. How much of the ruler did the moss cover altogether after two hours?

Answer 1

The moss will cover
`2(11)/(24)` inches of the ruler after 2 days.

Explanation:

After one hour, the moss had covered
`1(1)/(8)` inches of the ruler.

Again, after two hours, it had covered another
`1(1)/(3)` inches of the ruler.

Therefore, after two hours the moss covers altogether (
`1(1)/(8) + 1(1)/(3)`) inches of the ruler.

Now, (
`1(1)/(8) + 1(1)/(3)`)

=
`(9)/(8) + (4)/(3)`

=
`(9* 3 + 4 * 8)/(24)`

=
`(59)/(24)`

=
`2(11)/(24)` inches

Therefore, the moss will cover
`2(11)/(24)` inches of the ruler after 2 days. (Answer)