If 20 men can do a piece of work in 4 days, how long will it take 8 men to do the same work?
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If 20 men can do a piece of work in 4 days, how long will it take 8 men to do the same work?
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Answer:
10 days
Step-by-step explanation:
Solution 1:
Solving for the rate ,
Given: W = 1 , N = 20 Men , T = 4 days
W = NRT
W = 20(R)(4)
1/80 = R
Solving for the time ,
Given: W = 1 , N = 8 men , T = ? , R = 1/80
W = NRT
1 = 8(1/80)T
1 = 8/80T
1 = 1/10T
1×10 = T
10 = T
Solution 2:
20 : 8 = N : 4
20 × 4 = 8×N
80 = 8N
80/8 = N
10 = N