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?

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.

the answer is mp

step-by-step explanation: