Ultrasonic waves, propagating through a medium, can be detected by:
The correct answer is D
A and B are travelling towards each other with a speed of 30 km/hr and 40 km/hr. If they started at same time and A covered 20 km less distance than B b...
The speed of a train is 90 km/hr and it takes 16 seconds to cross a man. Find the time taken by train to cross a platform if the ratio of the length of ...
A was travelling from point X to point Y. He increased his speed by 14 km/h after every hour. He reached his destination in 18 hours. If his initial spe...
If the sum of upstream and downstream speed is 32 km/hr and the speed of the current is 6 km/hr. Then find time taken to cover 44 km in downward?
Ram makes four trips of equal distances. His speed on first trip was 120 km/hr and in each subsequent trip his speed was half of the previous trip. What...
Harsh and Dev planned to meet each other. Dev starts to travel from point A to B at the speed of 42 kmph at 10:00 AM and Harsh starts from point B to A...
Rajesh drove at the speed 100 km/hr from his home to a resort. While returning he got struck in traffic and took 6 more hrs; he could drive only at the ...
Excluding the Stoppages i.e. Non-stop, the speed of a Bullet train is 810 km/h and including the stoppages, it is 720 km/h. calculate for how many minut...
A car covered a journey in 10 hours with an average speed of 80km/hr. If it covers initial 30% of distance in 6 hours. Find the speed of car while cover...
A can walk a certain distance in 11 days when he rests 8 hours a day. How long will he take to walk twice the distance, twice as fast and resting twice ...
