Question

If 5 persons can build a wall in 12 days, how many persons can build it in 10 days?

Answer 1

Answer:

x2 = 6 persons

Step-by-step explanation:

5(x1) persons in 12(y1)days THEN x2 persons in 10(y2) days. this is in the inverse proportion. so x1×y1 = x2×y2

                         5×12 = x2×10

                         60÷10 =x2

                           ∴x2 = 6  

HOPE IT IS USEFUL FOR YOU

Answer 2

Answer:

Correct option is

A

6

Let total work be W, and work done by 1 man in 1 day be w, then

5×w×12=W

Also,

x×w×10=W ( where x is number of men required to build the wall in 10 days)

Equating both equations, we get,

x×w×10=5×w×12

⇒x=

10

60

=6men

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