Question

30 men can dig a ditch in 15 days. How long will 45 men take to dig it?
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Answer 1

Answer: 10 days

Step-by-step explanation:

Time taken by 30 men to dig a ditch = 15 days

∴ Time taken by one man to dig a ditch = 30 x 15

                                                                     = 450 days

∴ Time taken by 45 men to dig a ditch = 450 ÷ 45

                                                                   = 10 days

Answer 2

Step-by-step explanation:

30 men can dig a ditch in 15 days.

1 man can dig the ditch in (15×30) days.

45 men can dig the ditch in (15×30)/45 days.

= 10 days (ans:-)