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SBI PO 21 June 2015 Paper
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© examsnet.com
Question : 58
Total: 100
10 men can finish a piece of work in 15 days. 8 women can finish the same piece of work in 25 days. Only 10 women started working and in few days completed certain amount of work. After that 3 men joined them. The remaining work was completed by 10 wome and 3 men together in 5 days. After how many days 3 men joined 10 women ?
11
13
15
10
12
Validate
Solution:
10 × 15 men
→ 8 × 25 women
⇒ 3 men → 4 women
3 men + 10 women
→ (10 + 4) women → 14 women
8 women’s 1 day’s work
=
1
25
∴ 10 women’s 1 day’s work
=
10
25
×
8
=
1
20
part
∴
M
1
D
1
W
1
=
M
2
D
2
W
2
⇒
10
×
20
W
1
=
14
×
5
W
2
⇒
W
2
=
14
×
5
10
×
20
=
7
20
part
Remaining work = 1 –
7
20
=
13
20
∴ This part of work is done by10 women.
∴ Required time =
13
20
× 20 = 13 days
© examsnet.com
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