Two persons could fit new windows in a house in 3 days.
One of the persons fell ill before the work started. How long would the job take now?

Two persons could fit new windows in a house in 3 days. How many persons would be needed to fit the windows in one days?

A contractor estimates that 3 persons could wire Jasminder's house in 4 days. If he uses 4 persons instead of three, how long should they take to complete the job?

Work Problem on Time and Work Four boys and four girls can do a piece of work in three days. While two boys and seven girls can do it four days. How long would it take to one boy or one girl to do the work.

A person trying to lose weight (dieter) lifts a 10 kg mass, one , thousand times, to a height of 0.5 m each time. Assume that the potential energy lost each time she lowers the mass is dissipated, (a) How much work does she do against the gravitational force? (b) Fat supplies 3.8 xx 10^7 J of energy per kilogram which is converted to mechanical energy with a 20% efficiency rate. How much fat will the dieter use up?