If 10 men dig a ditch in 12 days, how long would 15 men take to dig it ?
Answers
Answered by
34
You can use a ratio to find the answer.
10 men : 12 days
15 men : ? days
If you let ? be x,
10 × 12 = 15 × x
120 = 15 × x
x = 120 / 15
Hence the answer is 8 days.
10 men : 12 days
15 men : ? days
If you let ? be x,
10 × 12 = 15 × x
120 = 15 × x
x = 120 / 15
Hence the answer is 8 days.
MelissaTan:
Are you sure?
Darn, didn't see that one. Thanks!
Eh, then how do you do it?
Was doing it haha, now done
Answered by
11
Given,
10 men can dig a ditch in 12 days.
If 15 men are there they can dig it in
10men ....... 12 days
15men ......... ?
This is inverse proportion.
X1Y1 = X2Y2
Let us take X1 = 10 men
Y1 = 12 days
X2 = 15 men
Y1 = x
10×12 = 15×X
120 = 15X
X = 120/15
X = 8.
Therefore 15 men can dig it in 8 days.
10 men can dig a ditch in 12 days.
If 15 men are there they can dig it in
10men ....... 12 days
15men ......... ?
This is inverse proportion.
X1Y1 = X2Y2
Let us take X1 = 10 men
Y1 = 12 days
X2 = 15 men
Y1 = x
10×12 = 15×X
120 = 15X
X = 120/15
X = 8.
Therefore 15 men can dig it in 8 days.
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