Question

12. 13. Write a program that prompts the capacity, in gallons, of an automobile fuel tank and the miles per gallon the automobile can be driven. The program outputs the number of miles the automobile can be driven without refueling Write a C++ program that prompts the user to input the elapsed time for an event in seconds. The program then outputs the elapsed time in hours, minutes, and seconds. (For example, if the elapsed time is 9630 seconds, then the output is 2:40:30.) Write a C++ program that prompts the user to input the elapsed time for an event in hours, minutes, and seconds. The program then outputs the elapsed time in seconds. 14. 23. Newton's law states that the force, F, between two bodies of masses M, and M, is given by: F=*(,). in which k is the gravitational constant and is the distance between the bodies. The value of k is approximately 6.67x10- dyn. cm/g. Write a program that prompts the user to input the masses of the bodies and the distance between the bodies. The program then outputs the force between the bodies. 24. One metric ton is approximately 2205 pounds. Write a program that prompts the user to input the amount of rice, in pounds, in a bag. The program outputs the number of bags needed to store one metric ton of rice.

Answer 1

12)

C++ program :-

#include <iostream>

using namespace std;

int main() {
int capacity;
int miles_p_gallon;
  
cout<<"Enter the capacity in gallons :"<<endl;
cin>>capacity;
  
cout<<"Enter miles per gallons :"<<endl;
cin>>miles_p_gallon;
  
double no_of_miles;
  
no_of_miles = (double)capacity/(double)miles_p_gallon;
  
cout<<"The no. of miles the vehicle can drive without refueling : "<<no_of_miles<<endl;
}

Output :-

✓ Execute Mode, Version, Inputs & Arguments GCC 9.1.0 Stdin Inputs Interactive Command Line Arguments 100 11 Execute ... G Result CPU Time: 0.00 sec(s). Memory: 3344 kilobyte(s) compiled and executed in 1.474 sec(s) Enter the capacity in gallons : Enter miles per gallons : The no. of miles the vehicle can drive without refueling : 9.69091

13)

C++ program :-

#include <iostream>

using namespace std;

int main() {
int user_seconds;
int miles_p_gallon;
  
cout<<"Enter the elapsed seconds time :"<<endl;
cin>>user_seconds;
  
int seconds;
int minutes;
int hours;
  
seconds = user_seconds%60;
minutes = user_seconds/60;
hours= minutes/60;
minutes=minutes%60;
  
cout<<"The time : "<<hours<<":"<<minutes<<":"<<seconds<<endl;
}

Output :-

V Execute Mode, Version, Inputs & Arguments GCC 9.1.0 Interactive Stdin Inputs 9630 CommandLine Arguments Execute Result CPU Time: 0.00 sec(s), Memory: 3348 kilobyte(s) compiled and executed in 1.414 sec(s) Enter the elapsed seconds time : The time : 2:40:30