Question

if 721 men construct a bridge in 48 days then in how many days 1442 men can do this

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Answer 1

Given,

Number of days 721 men need to construct bridge= 48

To find,

The number of days 1442 men need to construct the bridge

Solution,

Efficiency of the 721 men to construct the bridge = Number of men × Number of days

⇒Efficiency of the 721 men to construct the bridge = 721 × 48

⇒Efficiency of the 721 men to construct the bridge=34608

Let the number of days 1442 men need to construct the bridge be Y.

∴Efficiency of the 1442 men to construct the bridge = 1442 × Y

On equating the efficiencies of the men, we get

⇒34608= 1442 × Y

On interchanging LHS and RHS, we get

⇒1442 × Y=34608

⇒Y = $\frac{34608}{1442}$

⇒Y =24

Hence, 1442 can construct the bridge in 24 days.

Answer 2

Answer:

21 days

Step-by-step explanation:

This is the correct answer

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