M can do a piece of work in 20 days. He works at it alone fo

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IB ACIO Grade-II (Executive) Official Paper (Held On: 20 Feb, 2021 Shift 2)
General Awareness
1. 01
2. 02
3. 03
4. 04
5. 05
6. 06
7. 07
8. 08
9. 09
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
Quantitative Aptitude
1. 21
2. 22
3. 23
4. 24
5. 25
6. 26
7. 27
8. 28
9. 29
10. 30
11. 31
12. 32
13. 33
14. 34
15. 35
16. 36
17. 37
18. 38
19. 39
20. 40
Reasoning
1. 41
2. 42
3. 43
4. 44
5. 45
6. 46
7. 47
8. 48
9. 49
10. 50
11. 51
12. 52
13. 53
14. 54
15. 55
16. 56
17. 57
18. 58
19. 59
20. 60
English
1. 61
2. 62
3. 63
4. 64
5. 65
6. 66
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8. 68
9. 69
10. 70
11. 71
12. 72
13. 73
14. 74
15. 75
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18. 78
19. 79
20. 80
General Knowledge
1. 81
2. 82
3. 83
4. 84
5. 85
6. 86
7. 87
8. 88
9. 89
10. 90
11. 91
12. 92
13. 93
14. 94
15. 95
16. 96
17. 97
18. 98
19. 99
20. 100

SKINS
ADS

Red
Pink
Purple
Deep Purple
Indigo
Blue
Light Blue
Cyan
Teal
Green
Light Green
Lime
Yellow
Amber
Orange
Deep Orange
Brown
Grey
Blue Grey
Black
White

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M: +1.00/-0.25

M can do a piece of work in 20 days. He works at it alone for 5 days and N alone finishes the remaining work in 9 days. In how many days, both of them together can complete the work ?

[IB ACIO Grade-II (Executive) Official Paper (Held On: 20 Feb, 2021 Shift 2)]

A

12.5 days

B

8 days

C

10 days

D

7.5 days

EXPLANATION

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