See pic its about the law i rearrangesd from my phone picture ya ya a

Hi ;-)

70 rooms on 5 floors = **14 **rooms per floor

70 : 5 = 14

**Answer:**

30

**Step-by-step explanation:**

For a right triangle there is a formula ---> a² + b² = c² ("c" is always the side not touching the right angle)

24² + 18² = c²

576 + 324 = c²

900 = c²

30 = c

The 3rd side is 30

Let speed of the boat in still water = x miles per hour

Let speed of the current = y miles per hour

When water and current both flow in same direction then effective speed will be sum of both speeds that is (x+y)

now plug the given values in formula speed=distance/time

we get equation:

(x+y)=160/8

or x+y=20...(i)

When water and current both flow in opposite direction then effective speed will be difference of both speeds that is (x-y)

now plug the given values in formula speed=distance/time

we get equation:

(x-y)=160/40

or x-y=4

or x=4+y...(ii)

plug value of x into (i)

4+y+y=20

4+2y=20

2y=16

y=8

plug value of y into (ii)

x=4+8=12

**Hence final answer is given by:**

**Speed of the boat in still water = 12 miles per hour**

**Speed of the current = 8 miles per hour**

**Remark**

I don't know if you know anything about the sine law or not. There is no obvious relationship that I see. You can find various angles and create a ratio of the two lines, but I see nothing beyond that.

**Step One:** Find <MSR

<MSR = 180 - 110 from the diagram.

<MSR = 70o

**Step Two:** Find <SMR

Every triangle has 180 degrees

<SMR + 60 + 70 = 180

<SMR + 130 = 180

<SMR = 180 - 130

<SMR = 50o

**Step 3:** Use the Sine Law to express the relationship between MR and MS

MR/MS = Sin(70)/Sin(60)

MR/MS = 0.9397/0.8660 = 1.0851

MR = 1.0851 * MS