Question

Pedro bought lb of red sand and lb of brown sand to refill his sand box. Both types of sand cost $4.60 a pound. How much did Pedro spend on the sand? A. $29.85 B. $31.05 C. $33.05 D. $33.75

Answer 1

b. $31.05
5.5 + 1.25 = 6.75
6.75 * $4.60 = $31.05

Answer 2

If we know that Pedro bought 1
`(1)/(4)` pounds of red sand, and 5
`(1)/(2)` pounds of brown sand, and they both cost $4.60, then we just have to add the individual amounts of sand, since they cost the same.


`1 (1)/(4) + 5 (1)/(2) = 6 (3)/(4)`

So Pedro bought
`6 (3)/(4)` lbs of sand overall. Now, we just need to multiply the cost per pound by the total amount of sand he bought.


`6 (3)/(4) * 4.6 = 31.05`

Pedro spent $31.05 on sand, which is answer choice B.
Hope that helped =)