Question

Consider a block of wood having a volume of 125 cm³. If the block of wood burns at a rate of 15 g/min and you take the density of the wood as 757 kg/m³, how long will it take for the block to burn completely?

a. 1 min
b. 5 min
c. 10 min
d. 15 min

Answer 1

It will take approximately 6.3 minutes for the block to burn completely.

Step-by-step explanation:

To calculate the time it will take for the block of wood to burn completely, we need to first calculate its mass. We can use the density formula: density = mass/volume. Rearranging the formula, mass = density * volume. Converting the volume to meters cubed and density to kilograms per meter cubed, we have mass = 757 kg/m³ * 0.000125 m³ = 0.0946 kg. Now, we can calculate the time using the rate of burning: time = mass / rate = 0.0946 kg / 0.015 kg/min = 6.3 min. Therefore, it will take approximately 6.3 minutes for the block to burn completely.