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3 years ago

10

For each 90mm of coloured fabric Paul uses to make his curtains, he also uses 10cm of white fabric. Express the amount of white

fabric to coloured fabric as a ratio in its simplest form

1 answer:

BlackZzzverrR [31]3 years ago

6 0

10:9 of white fabric to coloured fabric

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A man can drive a motorboat 70 miles down the Colorado River in the same amount of time that he can drive 40 miles upstream. Fin

pochemuha

The speed of the current is 40.34 mph approximately.

<u>SOLUTION: </u>

Given, a man can drive a motorboat 70 miles down the Colorado River in the same amount of time that he can drive 40 miles upstream.

We have to find the speed of the current if the speed of the boat is 11 mph in still water. Now, let the speed of river be a mph. Then, speed of boat in upstream will be a-11 mph and speed in downstream will be a+11 mph.

And, we know that, $\text{ distance } =\text{ speed }\times \text{ time }$

$\begin{array}{l}{\text { So, for upstream } \rightarrow 40=(a-11) \times \text { time taken } \rightarrow \text { time taken }=\frac{40}{a-11}} \\\\ {\text { And for downstream } \rightarrow 70=(a+11) \times \text { time taken } \rightarrow \text { time taken }=\frac{70}{a+11}}\end{array}$

We are given that, time taken for both are same. So $\frac{40}{a-11}=\frac{70}{a+11}$

$\begin{array}{l}{\rightarrow 40(a+11)=70(a-11)} \\\\ {\rightarrow 40 a+440=70 a-770} \\\\ {\rightarrow 70 a-40 a=770+440} \\\\ {\rightarrow 30 a=1210} \\\\ {\rightarrow a=40.33}\end{array}$

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3 years ago

Henry has 3 black shirts and 7 blue shirts in his wardrobe two shirts are drawn with out replacement from the wardrobe what is t

laiz [17]

3/10 * 2/9 = 1/15
There is a 1/15 chance that both of the shirts he grabbed are black....

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3 years ago

ANSWER BOTH!!!!

laila [671]

Answer:

A. 35 million

B. $1519 increase

$7719 year end

Step-by-step explanation:

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2 years ago

Please explain your answer step by step thankyou

MaRussiya [10]

65
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2 years ago

How do you solve 2 (5-6) < 8f - 130

irga5000 [103]

2(5-6)<8f-130
(2x5)-(2x6)<8f-130
10-12<8f-130
-2<8f-130
-2+130<8f-130+130
128<8f
128/8<8f/8
16<f
f>16

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2 years ago