sandipgumtya wrote:As speed and time are inversely proportional,20% faster means 20% lesser time.Is this concept wrong. Pl correct me in detail.
As noted above:
20% faster = (120/100)r = (6/5)r.
Since rate and time are reciprocals:
(6/5)r --> (5/6)t --> 1/6 less time.
Other examples:
50% faster = (150/100)r = (3/2)r.
Since rate and time are reciprocals:
(3/2)r --> (2/3)t --> 1/3 less time.
20% slower = (80/100)r = (4/5)r.
Since rate and time are reciprocals:
(4/5)r --> (5/4)t = 1/4 more time.
50% slower = (50/100)r = (1/2)r.
Since rate and time are reciprocals:
(1/2)r --> 2t --> twice the time.
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