I think may be 2 but not 100% sure
2 ways:
1. legit way
2. le hacksta way
1. find what 25% is
percent means parts out of 100
25%=25/100=1/4
60 is 25% of something
60=1/4 times soemething
multiply both sides by 4
240=something
the number is 240
2. le hacksta way
25%=1/4
so if 60=1/4 of something then 4/4=1 number so multiply 60 by 4 to get 240
asnwer is 240
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.