Question

La velocidad de un hombre con la corriente es de 15 km / h y la velocidad de la corriente es de 2,5 km / h. La velocidad del hombre contra la corriente es de

Answer 1

Given:

La velocidad de un hombre con la corriente es de 15 km / h y la velocidad de la corriente es de 2,5 km / h. La velocidad del hombre contra la corriente es de

A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is?

To find:

The man's speed against the current

Solution:

Let's say,

"x" km/hr → represents the speed of the man

"y" km/hr → represents the speed of the current = 2.5 km/hr

The speed of the man with the current = 15 km/hr

i.e., Speed of the man downstream = 15 km/hr

$\implies x + y = 15$

on substituting the value of y = 2.5 km/hr

$\implies x + 2.5 = 15$

$\implies x = 15 - 2.5$

$\implies \bold{x = 12.5\:km/hr}$

Now,

The speed of the man against the current is,

= Speed of the man upstream

= $x - y$

= $12.5\: km/hr - 2.5\:km/hr$

= $\bold{10 \:km/hr}$

Thus, the man's speed against the current is → 10 km/hr.

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Also View:

a boat goes 30 km upstream and 44km downstream in 10 hours. in 13 hours, it can go 40 km upstream and 55 km downstream. determine the speed of the stream and that of the boat in still water.

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