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3 years ago

Find the surface area of the right rectangular prism shown below. units²

Mathematics

2 answers:

faust18 [17]3 years ago

5 0

Answer:

67 units^2

Step-by-step explanation:

The surface area of the prism is found by

SA = 2 ( lw+lh + wh)

= 2 ( 5*1.5+ 4*1.5 + 5*4)

= 2 ( 7.5+6+20)

= 2 (33.5)

= 67

Damm [24]3 years ago

4 0

Answer:

67units²

Step-by-step explanation:

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3 years ago

Big Ben, the famous clock tower in London, has a minute hand that is 14 feet long. How far does the tip of the minute hand of Bi

ycow [4]

Answer:

36.65 ft (2 dp)

Step-by-step explanation:

Angles around a point sum to 360°
1 hour = 60 minutes

Therefore, the minute hand of a clock travels 360° in 60 minutes

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$\sf =\dfrac{360}{60} \times 25=150^{\circ}$

To find how far the tip of the minute hand travels in 25 minutes, use the Arc Length formula:

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Given:

r = length of minute hand = 14 ft
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$\begin{aligned}\implies \textsf{Arc length} &=2 \pi (14)\left(\dfrac{150^{\circ}}{360^{\circ}}\right)\\ & = 28\pi \left(\dfrac{5}{12}\right)\\ & = \dfrac{35}{3} \pi \\ & = 36.65\: \sf ft\:(2\:dp)\end{aligned}$

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2 years ago

Which statement is true?

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