Answer:
Step-by-step explanation:
The candle is cylindrical in shape.
The formula for determining the volume of a cylinder is expressed as as
Volume = πr²h
Where
π = 3.14
r represents radius of the cylinder and also the candle
h represents the height of the cylinder and also the candle.
Looking at the diagram,
r = 4 cm
h = 6 cm
Volume of candle = 3.14 × 4² × 6
= 301.44 cm³
Looking at the table,
60 cm³ of the candle melts off in 2 hours, it means that the in one hour, the volume of candle that melts off would be 60/2 = 30cm³
Therefore, in 7 hours, the volume of candle that would melt off is
30 × 7 = 210 cm³
Therefore, the percent of candle that is melted off after 7 hours would be
210/301.44 × 100 = 69.67%
Approximately 70% to the nearest percent.
