Related Questions

By walking at 3/4 of his usual speed, a man reaches his office 20 minutes later than usual. His usual time is :
The usual value of the point angle of a drill is
The helix angle of a drill is __________ for drilling brass.
A person walking 5/6 of his usual rate is 40 minutes late. What is his usual time?
A train left 1 hour later than the scheduled time but in order to reach its destination 200 km away in time, it had to increase its usual speed by 10 km/hr. What is the usual speed (in km/hr) of the train?
Travelling at 4/5th of his usual speed, a man is 15 minutes late. What is his usual time to cover the same distance?
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.
In a screw jack, the effort required to lift the load W is given by (where $$\alpha $$ = Helix angle and $$\varphi $$ = Angle of friction)
The efficiency of a screw jack is maximum, when (where $$\alpha $$ = Helix angle and $$\varphi $$ = Angle of friction)
The efficiency of a screw jack is maximum, when (where $$\alpha $$ = Helix angle and $$\varphi $$ = Angle of friction.)