Page 200 - Computer Science V2.0 Class 11

z = int(input('Enter the number of days required by C alone: '))

#calculating the time if all three person work together
#formula used as per the question
days = (x * y * z)/(x*y + y*z + x*z)

#printing the total time taken by all three persons
print('Total time taken to complete work if A, B and C work together: ', days)
13. Write a program to enter two integers and perform all arithmetic operations on them.
Ans. def addition(a,b):
return a+b
def subtraction(a,b):
return a-b
def multiplication(a,b):
return a*b
def division(a,b):
return a/b

a = int(input("Enter First Number: "))
b = int(input("Enter Second Number: "))

print("Addition of {0} & {1} is : ".format(a,b), addition(a,b))
print("Subtraction of {0} & {1} is : ".format(a,b), subtraction(a,b))
print("Multiplication of {0} & {1} is : ".format(a,b), multiplication(a,b))
print("Division of {0} & {1} is : ".format(a,b),division(a,b))
14. Write a program to swap two numbers using a third variable.
Ans. def swap(num1,num2):
temp = num1
num1 = num2
num2 = temp
return num1,num2

num1 = int(input("Enter First Number: "))
num2 = int(input("Enter Second Number: "))

print('Numbers before swap',num1,num2)

num1, num2 = swap(num1,num2)

print('Numbers after swap',num1,num2)
15. Write a program to swap two numbers without using a third variable.
Ans. def swap(num1,num2):
num1, num2 = num2, num1
return num1,num2

num1 = int(input("Enter First Number: "))
num2 = int(input("Enter Second Number: "))

print('Numbers before swap',num1,num2)

186 Touchpad Computer Science (Ver. 2.0)-XI