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A red candle is 8 inches tall and burns at a rate of 7/10 inch per hour.A blue candle is 6 inches tall and burns at a rate of 1/5 inch per h
Question
A red candle is 8 inches tall and burns at a rate of 7/10 inch per hour.A blue candle is 6 inches tall and burns at a rate of 1/5 inch per hour. After how many hours will both candles be the same hight?
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Mathematics
5 months
2021-08-14T01:35:18+00:00
2021-08-14T01:35:18+00:00 1 Answers
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Answers ( )
Answer:
4 hours
Step-by-step explanation:
Given that:
Initial height of red candle = 8 inches
Rate of burning of red candle =
Initial height of blue candle = 6 inches
Rate of burning of blue candle =
To find:
Time taken in hours such that both the candles have the same height.
Solution:
Let the time taken such that both the candles have the same height =
hours
Height of red candle after
hours = 
Height of blue candle after
hours = 
Writing both the expressions as equal:
After 4 hours, height of both the candles will be same.