MBA Exam

A, B and C can individually complete a piece of work in 30, 50 and 75 days respectively. They worked on one day each, with A starting the work followed by B the next day and C the next day. They continued working like this till the 30th day after which the remaining work was completed by B and C working on alternate days with B working on 31st day. In how many days was the work completed?

1) 50
2) 45
3) 40
4) 35
5) 30

Read Solution (Total 1)

A, B and C can individually complete a piece of work in 30, 50 and 75 days respectively. They worked on one day each, with A starting the work followed by B the next day and C the next day. They continued working like this till the 30th day .

Means all worked for 10 days each in first 30 days.
They completed 2/3rd work in 30 days.
Balance 1/3 work is completed in 20 days by B and C working on alternate days with B working on 31st day. Each worked for 10 days.

so total 50 days were taken to complete the work.
11 years agoHelpfull: Yes(0) No(0)

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The number of zeroes in binary notation of 2^189 - 2^89 is :

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