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Allisa [31]
2 years ago
7

16.

Computers and Technology
1 answer:
dimaraw [331]2 years ago
3 0
  • Answer:

<em>r = 15 cm</em>

  • Explanation:

<em>formula</em>

<em>V = πr²×h/3</em>

<em>replace</em>

<em>4950 = 22/7×r²×21/3</em>

<em>4950 = 22/7×r²×7</em>

<em>4950 = 22×r²</em>

<em>r² = 4950/22</em>

<em>r² = 225</em>

<em>r = √225</em>

<em>r = √15²</em>

<em>r = 15 cm</em>

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Answer:

#include <bits/stdc++.h>

using namespace std;

int main()

{

   // variables

   char cust_t;

   int no_gallon;

   double cost=0;

   cout<<"Enter the type of customer(B for business or R for residential):";

   // read the type of customer

   cin>>cust_t;

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   {

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       cin>>no_gallon;

       // if number of gallons are less or equal to 8000

       if(no_gallon<=8000)

       {

           // calculate cost

           cost=no_gallon*0.006;

           cout<<"total cost is: $"<<cost<<endl;

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       else

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           // if number of gallons is greater than 8000

           // calculate cost

           cost=(8000*0.006)+((no_gallon-8000)*0.008);

           cout<<"total cost is: $"<<cost<<endl;

           

       }

       

   }

   

   // if customer type is residential

   else if(cust_t=='r'||cust_t=='R')

        {

           

       cout<<"please enter the number of gallons:";

       // read the number of gallons

       cin>>no_gallon;

       // if number of gallons are less or equal to 8000

       if(no_gallon<=8000)

       {

           // calculate cost

           cost=no_gallon*0.007;

           cout<<"total cost is: $"<<cost<<endl;

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       else

       {// if number of gallons is greater than 8000

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           cost=(8000*0.005)+((no_gallon-8000)*0.007);

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}

Explanation:

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please enter the number of gallons:9000                                                                                                                      

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