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Leto [7]
3 years ago
14

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

Mathematics
1 answer:
sweet [91]3 years ago
7 0

Answer:

10 km/h  

Step-by-step explanation:

Let s = man's speed and c = speed of current

    s + c = 15

         c = 2.5     Insert value of c

s + 2.5 = 15        Subtract 2.5 from each side

        s = 12.5 km/h

=====

Speed against current

= 12.5 – 2.5

= 10 km/h

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Answer:

See Explanation Below

Step-by-step explanation:

The question is incomplete (because the figure to calculate the perimeter is missing).

However from the comment attached to your question, I understand that the figure looks like a plus sign.

The perimeter of a plane shape is calculated by adding the length of each side of the shape.

Take for instance;

A square of length 5cm.

We know that a square has 4 equal sides; meaning that the length of the other sides are also 5cm

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2x+3+x+9 = 180 => 3x = 168 => x = 56;
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