Quiz-3

Solution:
One day’s effort by all the three = 1/40
Binny and Max’s one-day effort = 1/60
The time required by Anna to do the task
= 1/40 + 1/60
= 1/120
Anna will take 120 days
Correct Answer C

Solution:
Work done by L in one day = 1/9
Work done by M in one day = 1/18
Work done by N in one day = 1/27
Therefore, together they need 1/9 + 1/18 + 1/27
= 11/54
= 54/11  or  4 (10/11)  days
Correct Answer C

Solution:
Divya’s 10 day’s plan = 1/ 10 * 5
= ½
Now, when Lara completes the remaining plan,
= 1 – ½
= ½
The time needed by Lara to complete the plan
= 1/8 * 2
= 1/4
= 4 days

Correct Answer C

Solution:
Men’s one-day effort = 1/32
Women’s one-day effort = 1/42
Work done together = 1/32 + 1/42
= 37/672
=1/18.16
Hence, 24 men and 32 women will finish work in 18.16 days.
Correct Answer B

Solution:
Teacher’s one-day effort = 1/12
Children’s one-day effort = 1/24
Work done together = 1/12 + 1/24
= 3/24
= 1/8

Hence, 8 teachers and 12 students will complete the course in 8 days.

Correct Answer B

Solution:
Number of hours = 30 * 60 /15
= 1800/15
= 120 hours
Correct Answer D

Solution:

Number of minutes =

30 * 60 = 50 * minutes

Minutes = 36

Correct Answer A

Solution:
Number of days 10 children need to finish the task
= 25 * 18 = 10 * x
x = 450 / 10
= 45 days
Correct Answer C

Solution:
1 day’s efforts of Kane = 1/24
1 day’s efforts of Mic = 1/32
Work is done both of them together = 1/24 + 1/32
= 7/96
Together, both of them will finish the work in 96/7 days.
Correct Answer B

Solution:
Time is taken by Lucky to finish the task =
1/60 – 1/180
= 1/90
= 90 minutes
Correct Answer B