Question

If 15 men can dig a trench 35m long in 1 day, how many men can dig a similar trench 84 m long in 1 day

​

Answer 1

Answer:

⇒ 35 m long = 15 men in 1 day

⇒ 1 m long = 15/35 men in 1 day

⇒ 1 m long = 3/7 men in 1 day

⇒ 84 m long = (3/7 × 84) men in 1 day

⇒ 84 m long = (3 × 12) men in 1 day

⇒ 84 m long = 36 men in 1 day.

HENCE, it will need 36 men for 84m long trench to dig in 1 day.

Answer 2

$\sf{\bold{\red{\boxed{Solution}}}}$

$\implies$35m trench can be dig by = 15men

$\implies$ 1m trench can be dig by = $\dfrac{15}{35}$

$\implies$ 84m trench can be dig by = $\dfrac{15\times 84}{35}$

$\implies$ 84m trench can be dig by = $\dfrac{3\times 84}{7}$

$\implies$ 84m trench can be dig by = ${3\times 12}$

$\implies$ 84m trench can be dig by = $36men$