A) 13
B) 39
C) 45
D) 55
Correct Answer: B
Solution :
We are asked to find out the number of labourers, So we, compare each item with the number of labourers as below. More number of boxes \[\Rightarrow \] More labourers \[i.e.\] the relationship is direct Less number of days \[\Rightarrow \] More number of labour \[i.e.\] the relationship is inverse \[\therefore \] Boxes \[35:65\] Days \[5:7:\,\,:15:x\] \[\therefore \] \[\frac{35}{65}\times \frac{5}{7}=\frac{15}{x}\] \[\therefore \] \[x=\frac{15\times 65\times 7}{35\times 5}\] \[=13\times 3\] \[=39\]
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