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Rs aggarwal solutions
Grade 7 
Mathematics
Mathematics class 7th RS Aggarwal
Unitary Method
Unitary Method Exercise 9C
Question 8
Mathematics
Mathematics class 7th RS Aggarwal
Unitary Method
Unitary Method Exercise 9C
Question 8
Unitary Method | Unitary Method Exercise 9C
Question 8
8 men can finish a piece of work in 40 days. If 2 more men join them, the work will be completed in
(a)30 days (b)32 days (c)36 days (d)25 days
Solution:-
(b)32 days
Because
8 men can finish a piece of work in = 40 days
1 man can finish a piece of work in = (8 × 40)
If 2 more men join them, i.e. 10 men can finish a work in = (8 × 40) / 10
= 32 days
Question 8
8 men can finish a piece of work in 40 days. If 2 more men join them, the work will be completed in
(a)30 days (b)32 days (c)36 days (d)25 days
Solution:-
(b)32 days
Because
8 men can finish a piece of work in = 40 days
1 man can finish a piece of work in = (8 × 40)
If 2 more men join them, i.e. 10 men can finish a work in = (8 × 40) / 10
= 32 days
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