Question

Ten men take 4 days to complete the task of tarring a road.How many days would 8 men take

Answer 1

10 men take = 4 days

1 man take =

$\frac{4}{10} = 0.4$

0.4 days

so, 8 men will take =

$\frac{4}{10} \times 8 \\ = 3.2$

3.2 days

Answer 2

Work Done = number of men * number of days

Work Done = 10(4) = 40 man days

When 8 men are working then, days required are ‘d’.

Work Done = 40 = 8d i.e. d = 5 days