What is the total surface area of the drawing? A. 564 km2 B. 256 km2 C. 265 km2 D. 549 km2

Question

asked Oct 14, 2018 102k views

2 Answers

Soumalya Banerjee · Answer 1 · 2018-10-20T07:45:32+0000

Answer:

Option D
$549\ km^(2)$

Explanation:

we know that

The surface area of the figure is equal to

SA=2B+Ph

where

B is the area of the base

P is the perimeter of the base

h is the height of the figure

so

Find the area of the base B

The area of the base is equal to the area of five isosceles triangle

$B=(5)*((1)/(2)*9*6.2)=139.5\ km^(2)$

Find the perimeter of the base P

$P=9*5=45\ km$

$h=6\ km$

substitute

$SA=2*(139.5)+45*6=549\ km^(2)$