The table shows the time Merrida spent driving and the number of miles she drove. She drove the same number of miles each hour.
How many miles did she travel each hour? • 23 miles per hour • 35 miles per hour • 42 miles per hour • 53 miles per hour
1 answer:
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Answer:
Option A is the correct answer.
Explanation:
The given pyramid has 3 lateral triangular side as shown below.
Base of triangle = 12 unit
We need to find perpendicular.
By Pythagoras theorem we have
Perpendicular² = 10²-6²
Perpendicular = 8 unit
So area of 1 lateral triangle = 1/2 x Base x Perpendicular.
= 1/2 x 12 x 8 = 48 unit²
Area of lateral side = 3 x 48 = 144 unit²
Option A is the correct answer.
