2 Answers

Felix Borzik · Answer 1 · 2019-07-20T01:37:05+0000

If we had two of these they'd fit together to form a nice 5 by 7 by 8 rectangular prism, just like the last one.

So our area is (5)(7)(8)/2 = 35(4) = 140

Choice B

Trafalmadorian · Answer 2 · 2019-07-23T07:57:21+0000

Answer: B.
$140\text{ units}^3$

Explanation:

From the given picture it can be seen that, the height of the right triangle h= 5 units

The base of the right triangle b= 7 units

The length of the base l= 8 units

We know that the volume of the right triangular prism is given by :-

$\text{Volume}=(1)/(2)bhl$ , where b is the base and h is the height of right triangle and l is the length of the rectangular base of prism.

Now, the volume of the given right triangular prism is given by :-

$\text{Volume}=(1)/(2)(7)(5)(8)\\\\\Rightarrow\text{Volume}=140\text{ units}^3$

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