10th grade chemistry problem?

Question

You need to transport oak boards in a truck that can carry up to 2.00x10^3 kg of cargo. The boards are 2.0m x 12cmx12cm and the density of oak is 0.80 g/cm^3. How many boards can the truck carry?

if you could show how you did it, it would be MUCH appreciated!

Answer 1

I am in 11th grade chem and I worked this problem out on my own and I found the 86. whatever to be correct.

This probably wont help but here are some tips:

They've given you kg

Convert that to grams

They've given you 2.0 m x12cm x 12cm

Get that answer in centimers

Then D=m/v

You want mass so

DV=m

You are given V and D so take the product of V and D and divide that by the total number of grams (you should have 2x10^6 g)

Answer 2

okay dokay.....

the truck can carry 2000kg

which is 2,000,000 g

each board is 200*12*12 cm which gives 28800 cm^3

multiply this by 0.8 to get each boards weight.... which gives 23040grammes/board

if truck can carry 2*10^6 grammes and each board wieghs 23040 grammes then......

2*10^6/23040 = 86.80..........................

so the truck can carry 86.8 boards but round it to 86...because you cant get 0.8 of a board (well you can but not for the question.)