We have four gears with below features
=> Both Gear A and D has 60 teeth
=> Gear B has 40 teeth
=> Gear C has 20 teeth
=> Every two minutes, Gear B makes 25 full turns.
What is the relative speed of Gear A and Gear B?
1) 25*40=1000 teeth per 2 min
1000/60= 50/3 turns per 2 min
50/3/25=2/3 relative speed of Gear A vs Gear B
2) simply 40/60= 2/3
Two round of A is equal to three round of B.
A man runs with speed 54 km/hr in a straight path starting from A at 8 AM for 35 minute. What should be his speed for rest of the motion, completing 100 kms from A to B upto 9 AM.
A man is found dead in a forest with full scuba gear on, the forest has been down and the nearest lake is 5 kms away.
How did he get there?
A car start with a velocity 20 km/hr and after every hour its speed increases by 10 km/hr.
After 8 hour it starts decreasing the speed 10 km/hr after every hour and finally it stops in the destination.
What is the total length of the journey?
A ball is thrown upwards with speed v from the top of a tower and its reaches the ground with speed 3v.
What is the height of the tower?
A helium balloon leaves the ground at a point A and rises vertically at uniform speed.
At the end of 5 minutes, Rohan finds the angular elevation of the balloon as 30 degree.
If the point at which Rohan is standing is 550 m away from point A, what is the speed of the balloon in m/s?