So five times five is twenty five. Then do three times fifteen which is forty five.
25+45=70
        
                    
             
        
        
        
You should first find out what lines are what,
Like for example, If you had 5 - 10 - 15 as the Y Lines and the bar was between 5 and 10 then your best bet would be to estimate what the middle of 5 and 10 is which would be 7 or 8.
        
             
        
        
        
The sum of two numbers will be zero when you have the same number and one is positive and one is negative. For example 1 + -1= 0
        
                    
             
        
        
        
Answer:
The height of the another cylinder 'h'  = 7
Step-by-step explanation:
<u>Explanation</u>:-
<u>Step 1:-</u>
Surface area of the cylinder  = 2пrh + 2пr^2
Given radius of first cylinder is 20cm
given height of the first cylinder is 2 cm
The surface area of first cylinder is = 2пrh + 2пr^2
                                                           = 2п(20)(2)+2п(2)^2
                                                           = 4п(20+2)
  The surface area of first cylinder is  88п
<u>Step 2</u>:
given data The surface area of first cylinder is  88п is same as second cylinder also 
<u>Find the height of the second cylinder</u>
Given Radius of the second cylinder r = 4 
Surface area of the cylinder  = 2пrh + 2пr^2 = 88п
                                                    2п(4)h+2п(4)^2 =88п
 on simplification we get
                                    2п (4h+16) = 88п
after cancellation '2п' value and on simplification, we get
                                     4h+16 = 44
                                     4h = 44-16
                                   4h = 28
                                  h=7
Therefore the height of the another cylinder is 'h' =7