Answer:My answer is Temp-pH I 
I don't know if it is right or not
 
        
             
        
        
        
Answer:
725
Step-by-step explanation:
30 - 1 = 29
29 x (25/1) = 725
 
        
             
        
        
        
Consider one pyramid
Side length of base = 1.5cm and its height is 1 cm
Slant height of one of the lateral faces =  sqrt(1^2 + 0.75^2) =  1.25 cm
Area of one of the triangular faces = 0.5 * 1.5* 1.25 =  0.9375 cm^2
There are 8  of these so the required surface area = 8 * 0.9375 
=  7.5 cm^2 Answer