Question
A hemisphere has a radius of 6.2 cm. Find its total
surface area (use π = 3.14) (round off to two decimal places).Solution
Given: Radius = 6.2 cm Total surface area of hemisphere = 3 πr2 Total surface area of hemisphere = 3×6.2×6.2×3.14   = 362.10 cm2
The least number which when divided by 9, 12, 15, 18, and 21 leaves the same remainder 7 in each case, is:
Train X running at a speed of 32 km/hr crosses train Y in 20 seconds. Find the speed of train Y (in km/hr), if the sum of the length of train X and Y is...
What will be the greatest common divisor (GCD) of (x² - 11x + 30) and (x² - 9x + 20).
If the total ages of A and B is 18 years more than the total age of B and C. C is how many years younger than A?
- The LCM and HCF of two integers are 540 and 12 respectively. If one of the integers is 90, find the second integer.
- Determine the difference between the LCM and HCF of the numbers 15, 25, and 50.
The LCM of two natural numbers is 12 times their HCF. If the product of given two numbers is 432, then find the LCM of the numbers.Â
Four machine makes a beep after every 1, 3, 5 and2 min respectively . In 5hrs , how many times do they beep together if they have just beeped together. ...
- The LCM of two numbers is 240, and they are in the ratio 3:5. Determine the sum of these numbers.
A man deposits Rs. 25,000 at a simple interest rate of 8% per year. What amount will he receive after 5 years?
Relevant for Exams:
