Posted by **angad** on Tuesday, December 11, 2012 at 9:15am.

if 16 men can build a road of 9 km in 3 days then how many men can build 21 km road in 5 days.

- maths --plse help me.. -
**Steve**, Tuesday, December 11, 2012 at 10:22am
we have

9km/(16men*3days) = 3/16 km/man-day

so, you conversion factor is

16/3 man-day/km

so, with 21km and 5 days, you will need

16/3 man-day/km * 21km / 5day = 22.4 men

## Answer This Question

## Related Questions

- Math - It takes 8 men to build a fence in 9 days so how long it would take 3 men...
- math - 9 men build a house in a working 4 days .how many workmen ,working at the...
- Maths ( urgent help ) - 20 men can do a piece of work in 24 days. After working ...
- maths - 300 men were engaged to complete a job in a certain number of days. but ...
- math - A construction crew has just finished building a road. The road is 10 ...
- Maths - A soak away was dug by 5 men in 24 days. How many days will it take 15 ...
- math - 20 men can do a piece of work in 24 days. After working for 6 days, ...
- STATISTICS - Length of Hospital Stays: The average length of “short” hospital ...
- maths - 300 mens were engaged to complete a job in a certain number of days. ...
- maths - 8 men can build a house in 6 months how long will it take 12 men tovdo ...

More Related Questions