Question

7 10 mm 6 mm 7 mm I need help to solve this

Answer 1

Length = 6 mm

Height = 7 mm

Width = 10 mm

We know that,

$\boxed{\rm Surface\:area\:of\:rectangle=2(LB)+2(BH)+2(HL)}$

• Plug in the given values!~

$\sf \nrightarrow \: SA = 2 \times (6 \times 10) + 2 \times (7 \times 10) + 2 \times (6 \times 7)$

$\sf \nrightarrow \: SA = 2 \times 60 + 2 \times 70 + 2 \times 42$

$\sf \nrightarrow \: SA = 120 + 140 + 84$

$\tt \multimap \: SA = 344 \: {mm}^{2}$

Answer 2

Solution:

Note that:

• Surface area: 2(LB) + 2(BH) + 2(LH)

Substitute the values given into the expression to find the surface area.

• 2(7 x 10) + 2(6 x 6) + 2(6 x 10)
• => 2(70) + 2(36) + 2(60)
• => 140 + 72 + 120
• => 332 mm²

The surface area of the rectangular prism is 332 mm².