Question
The sound produced by a bat is
–Solution
Although bats use echolocation to detect their prey, and find their way around in the dark, the sounds which they emit are 'ultrasonic', which is another way of saying they are beyond the range of normal human hearing. Ultrasound is a cyclic sound pressure wave with a frequency greater than the upper limit of the human hearing range. Ultrasound is thus not separated from "normal" (audible) sound based on differences in physical properties, only the fact that humans cannot hear it.
₹ 6,900 is divided between L, M and N in the ratio of 6: 8: 9. If 'L' and 'M' each gave ₹ 300 to N then the new ratio of shares of L, M and N is:
The speeds of two trains are in the ratio 7:9. If the first train travels 315 km in 3 hours, how far will the second train travel in 5 hours?
A company produces three types of products: X, Y, and Z. Initially, the production ratio of X to Y to Z is 5:7:8. The total production of these three pr...
Ratio of cats to dogs in a shelter is 4:3. If 16 cats are adopted and 20 more dogs arrive, their numbers become the same. What was the initial number of...
If ₹19,500 is divided among ‘A’, ‘B’, ‘C’, and ‘D’ in the ratio 6:8:5:7, then find the share of ‘C’.
...- Manisha distributed 240 pencils among her three classmates—Nikhil, Arjun, and Sneha—in the ratio 2:3:5 respectively. Find the difference between the nu...
Amit had 650 pens. He gave 40% of them to Suman and Rishi in the ratio 3:2. Find the difference between the number of pens left with Amit and the number...
If 50 less had applied and 25 less selected, the ratio of selected to unselected would have been 9 : 4. So how many candidates had applied if the ratio ...
Two partners, X and Y, invested in a business in the ratio of 5:8. After 5 months, X increased his capital by 25%, and 2 months later, he increased it a...
A plot has to be divided among P, Q and R in the ratio 3:4:6 respectively. If the area of plot received by R is 4800m ² more than the area of plot ...