Quiz-1

Correct Answer: A

      Solution:

            Work done by Lita in a single day  = 1/15

Work done by Babita in a single day  =1/20

Work done together = 1/15 + 1/20

=7/60

Hence, number of days = 60/7

Correct Answer: B

Solution:

Time is taken by Simran = 4 days

Work done by Simran in one day = 1/4

Time taken by Tina to do the work = 8 days

Work done by Tina in one day = 1/8

one day work completed by both of them = 1/4 + 1/8

= 3/8

Time taken by both of them to do the work = 8/3

Correct Answer: C


Solution:

Number of days = 35 x 50 /20

= 87.5

Correct Answer: B

Solution:

Number of employees required to finish the project in 150 days

= 40 x 200 = E x 80

Number of employees = 8000 / 80

= 100 employees

additional employees required is = 100-40 = 60

Correct Answer: B

Solution:

Time taken by Z alone to build the dog house = (1/55) - (1/88)

= 3/440

Hence, the required time is 440/3 minutes.

Solution:

Rohan’s work in a single day= 1/14

Boby’s work in a single day = 1/8

Work done together = (1/14 + 1/8)

= 11/56

Hence, if they work together, they can complete the piece of work in 56/11 days.

Correct Answer: C

Solution:

The time required to complete the work =

(1/50) – (1/60)

= 1/300

= 300 days

Correct Answer:  B

Solution:

Total time required to complete the work =

(1/7) – (1/13)

= 6/91

= 91/6 days

Correct Answer: D

Solution:

Work done by them together in one minute=1/50

Work done by Eric and Fred together in one minute=1/70

work done by George in one minute=1/50 – 1/70

= 2/350 minutes

time taken by George to complete the work alone= 175 minutes

Correct Answer: C

Solution:

work of Raina in a single day= 1/50

work of Mona in a single day = 1/32

Work done both of them together = 1/50 + 1/32

= 16+25/800

= 41/800

Together, both of them will complete the work in 800/41 days.