Yoga = 30 minutes longer than stationary jogging
b. stretching = 10 minutes shorter than stationary jogging
c. sit-up exercises = 5 minutes shorter than stationary jogging
d. jumping jack = 20 minutes shorter than stationary jogging
e. Find the sum of the expressions formed in letter a and d.
f. If x is half an hour, what is the answer in letter e in terms of minutes?