Question
Which medium cannot propagate sound
waves?Solution
Sound waves require a medium (solid, liquid, or gas) to travel through as they are mechanical waves. In a vacuum, where there are no particles to transmit vibrations, sound cannot propagate.
If two successive discounts of 20% and 12% are applied, what would be the equivalent single discount?
A man spent 20% of his income in May. If his savings is increased by 20% in June and becomes Rs. 11520, then find the income of man in May.
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A gave 40% of amount to B. B gave 20% of amount received from A to C. If amount received by C from B is Rs.184, then find the amount received by B from A.
The income of ‘A’ increases by 10% every year. If his income 2 years hence from now will be Rs. 27951, then find his income a year before from now.<...
Suresh spends 30% of his monthly salary on travel, 40% of the leftover on food, and saves the remaining amount. If he saves Rs. 1680, find out how much ...
A gets 34% of the full marks in an exam and fails by 80 marks. B gets 36% of the full marks in the same exam and he also fails by 64 marks. What is the ...
Aman allocated 40% of his monthly income for purchasing newspapers and then spent 52% of the remaining amount on food, saving the rest. If the amount sa...
- In a mayoral election, candidate P got 75% of the total votes, winning over candidate Q by 9,600 votes. What is the number of votes secured by candidate Q?
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