Question

20 men can build a road of 15 km long in 18 days. how long will 25 men take to complete a 10 km long road?​

Answer 1

for 1 person the time will be =18×20=360days.
if 1 men compete 15 km in 360 days than .
25 mens completes 10 km in.
360÷25=14×1/2.
if the length is 10 km than 4.8

Answer 2

20 men ko 15 kilometers ke liye 18 days lage

1 man ko 15 kilometers ke liye (18×20) days lagenge

1 man ko 1 kilometer ke liye (18×20)/15 days lagenge

so 1 man ko 10 kilometer k liye 18×20×10/15 days lagenge

25 men ko 10 kilometers k liye (18×20×10) / (15×25) days lagenge.

= 3600/375

=9.6 days