Answer:
The mass of the apples in the box are 1145.95 lb.
Step-by-step explanation:
Given that,
Width = 3.5 ft
length = 3.5 ft
Depth = 2.75 feet
Density = 49.3 lb/ft³
We need to calculate the volume
Using formula of volume
![V=l* h* b](https://img.qammunity.org/2020/formulas/physics/college/nmsgurpbichr1yfyyk7v6t0n4ngkztaml1.png)
Put the value
![V=3.5*3.5*2.75](https://img.qammunity.org/2020/formulas/physics/college/98xuubxwau23t5irac3zc06pu8gz2zcgn4.png)
![V=33.6875\ ft^3](https://img.qammunity.org/2020/formulas/physics/college/lzw5pfdc3or3h007pu8k7pyw927q1k8lgn.png)
We need to calculate the mass
Using formula of density
![\rho=\dfraxc{m}{V}](https://img.qammunity.org/2020/formulas/physics/college/zaraxxt065glxnw7gc8n0w3jt019wbzjn0.png)
![m=\rho*V](https://img.qammunity.org/2020/formulas/physics/college/qo8zjwt08lu0gx292df86nyg2qc4sbse5l.png)
Put the value into the formula
![m=49.3*33.6875](https://img.qammunity.org/2020/formulas/physics/college/nl10gqsd7n73bw0l6gb1im1lr1fro62vwj.png)
![m=1660.79\ lb](https://img.qammunity.org/2020/formulas/physics/college/hlmehgorwp2x7sc4tx8i6r10hr2rh8n0qq.png)
But porosity is 31 % so apples is 69% mass of total container.
So, Total mass in pounds is
![M=(69)/(100)*1660.79](https://img.qammunity.org/2020/formulas/physics/college/shynuoizbvua46g0qcwfmbm0xi64qz42do.png)
![M=1145.95\ lb](https://img.qammunity.org/2020/formulas/physics/college/z4qpu4p77akfjgot26ruf0toku7lejk4q0.png)
Hence, The mass of the apples in the box are 1145.95 lb.