Question
Quantitative Aptitude Question on Time Speed and Distance
A candle of height 10 cm burns at the rate of 2 cm/hr initially. After it has burnt 20%, the rate increases to 3 cm/hr. Then, after it has burnt 50%, the rate of burning changes again such that it takes 2 hours for the remaining candle to burn up completely, then what is the overall average rate at which candle gets burnt?
A
2.6 cm/hr
B
2.7 cm/hr
C
2.4 cm/hr
D
2.5 cm/hr
Answer
2.5 cm/hr
Explanation
Solution
The correct answer is (D),2.5 cm/hr