Question
In which medium, velocity of sound is
maximum?Solution
The speed of sound is highest in solid. The speed of sound depends on the density of the medium through which it is travelling.
The population of a city increased by 11% for two consecutive years and then decreased by 30% in the third year. If the final population in 2023 was 21,...
Ajay spent 35% of his monthly income on rent and 43% of the remaining on food and the rest amount is saved by him which is Rs. 1482, then find the month...
- In a certain examination, Neha got 46% and was 10 marks short of passing. Kunal got 52% and scored 8 marks more than required. What are the passing marks?
The population of a village is 30,000. It increases at the rate of 15% during the first year and decreases at the rate of 25% during the second year and...
75% of A is equal to 40% of C and 80% of B is equal to 100% of A. If sum of 50% of B and 30% of C is equal to 95, then find 80% of A.
Pokemon's expenditure exceeds his savings by 40%. He allocates 30% of his total expenditure towards rent, which amounts to Rs. 2100. Calculate Pokemon's...
In 2018, an online course had 'r' subscribers. Subscribers increased by 50% in 2019 and another 25% in 2020. However, in 2021 subscribers decreased by 4...
- In a school of 960 students, the ratio of boys to girls is 5:3. During the annual test, 20% of boys and 25% of girls did not pass. What is the number of st...
I purchase 100 kg of tea and sell it for a profit to the extent of what I would have paid for 40 kg. What is my profit percentage?
A person saves 30% of his monthly income. If his monthly is increased by 45% and he still saves the same amount as before then find percentage increase ...
