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Question

A man completes a work in 1 hour in his first attempt and in his second attempt he completes it  in (1/4) of 1 hour. In his third attempt, he completes it in (4/5)th time of what he took in his second attempt. How long did he take to complete the work in his third attempt ? [3 MARKS]


Solution

Concept: 1.5 Marks
Application of the concept: 1.5 Marks

Time taken by the man in his first attempt            = 1 hour

 Time taken by the man in his second attempt      = 14×(1)

                                                                         =  14 hour

  Time taken by the man in his third attempt          = 14×45

                                                                         = 15

Hence he  took  =
15 hour to complete the work in his third attempt .

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