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1 year ago

15 men can dig a trench of 90m long in 3 hours.how long will it take 16 men to dig a trench 48m long

Mathematics

1 answer:

Shkiper50 [21]1 year ago

8 0

It will take 1.5 hours for 16 men to dig a trench 48 m long.

<h3>How can this be calculated?</h3>

It should be noted that the time needed is direct proportional to the length of the trench, and inverse proportional to number of men.

The equation can be written as

t=kl/m..................................................... eqn(1)

Then if we substitute the given figures we have,

3=90k/15

Then k= 0.5

then substitute into eqn(1) we have

t=0.5 l/m

Therefore, since 16 men, 48m long, is required, the time will now be calculated as :

t=0.5 48/16

t= 1.5 hrs.

Therefore, It will take 1.5 hours for 16 men to dig a trench 48 m long.

Learn more about proportionality on:

brainly.com/question/21749206

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