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DIPANKAR SAHA 10 years ago

If A & B work together, they will complete the job in 7.5 days. If A works alone and completes half the job and then B takes over and completes the remaining half alone, they will be able to complete the job in 20 days. How long B alone will take to do the job, if A is more efficient than B ?
(A) 20 days
(B) 30 days
(C) 40 days

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Sujan Chhetri 10 years ago

since A is more efficient than B therefore no.of days taken by B to complete the job alone will be 30 days

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Devendra Marghade 10 years ago

(B) 30 days

(1/A) + (1/B)= 1/7.5 or 2AB=15(A+B) ---(i)
Half of the work from A & B= (A/2) + (B/2)=20, A+B=40 ---(ii)
From (i) & (ii), AB=300 ---(iv)
Values matching for AB=300 & A+B=40, where A is more efficient than B, So A will be less than B
We have A=10, B=30

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DIPANKAR SAHA 10 years ago

Mr. Decimal enters a lucky draw that requires him to pick five different integers from 1 through 31 inclusive. He chooses his five numbers in such a way that the sum of their logarithms to base 10 is an integer. It turns out that the winning 5 numbers have the same property, i.e. the sum of their logarithms to base10 is also an integer. What is the probability that Mr. Decimal holds the winning numbers?
o 1/8
o 1/6
o 1
o 1/2
o 1/4

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DIPANKAR SAHA 10 years ago

You are given 87 matchsticks. They are arranged in rectangular manner.Find the number of triangles formed?

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DIPANKAR SAHA 10 years ago

6.A bag contains six sticks of the following lengths 1 cm, 3 cm, 7 cm, 11 cm and 13 cm. three sticks are drawn at random from the bag. What is the probability that we can form a triangle with those sticks? 1.11/20
2.1 3.1/4 4.2/5..asked in TCS

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DIPANKAR SAHA 10 years ago

In an year N, the 320th day of the year is Thursday. In the year N+1 the 206th day of the year is also Thursday. What is the 168th day of In the year N-1? 1.Friday 2.Thursday 3.Tuesday 4.Saturday

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DIPANKAR SAHA 10 years ago

In Loonyville, four people called Doctor, Engineer, Lawyer and Architect follow the professions of doctor, lawyer, engineer and architect. However, none of them follow the profession indicated by their name. Doctor plays bridge very regularly, as he thinks it as an intellectual card game. Doctor is allergic to sea food, and does not eat it at all. Architect nearly died in a car accident two years ago. The architect is very poor at card games and does not play them at all. The engineer loves fish and has it twice a week. The engineer is a good driver, and has never been involved in a car accident. Engineer does not like the Lawyer’s habit of constantly interrupting others.What is the
profession of Engineer? 1.a lawyer 2.an architect 3.a doctor 4.Cannot be determined.plz solve ia asap...

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