A 10-inch long candle lasts for 45 minutes. How long will another candle of same material and same thickness but 4 inches longer than the previous one last?
63 minutes
Let us assume that new candle will last for t minutes.
Length of new candle = 10 + 4 = 14 inches
This is a direct-variation question.
t = 45×1410
t = 63 minutes