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Gears A and D have 60 teeth each, gear B has 40 teeth, and gear C has 20 teeth.
Suppose that gear B makes twenty complete turns every minute,
explain the relative speed of gears A and D
A and D will rotate with same speed
Speed of A/Speed of B = no. of teeth of B/ no. of teeth of A
Speed of A/ 20 = 40/60
Speed of A and D=40/3
Answer Is 40/3
A train overtakes two persons walking along a railway track. The first one walks at 4.5 km/hr. The other one walks at 5.4 km/hr. The train needs 8.4 and 8.5 seconds respectively to overtake them.
What is the speed of the train if both the persons are walking in the same direction as the train?
A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively.
What is the speed of the train?
Points A and B are 60 km apart. A bus starts from A and another from B at the same time. If they go in the same direction they meet in 6 hours and if they go in opposite direction, they meet in 2 hours.
What is the speed of the bus with greater speed?
A goods train runs at the speed of 72 kmph and crosses a 250 m long platform in 26 seconds. What is the length of the goods train?
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