For the following questions answer them individually
14 people can do work in 28 days. In how many days, can 8 people complete double the work?
A solid hemisphere of radius 8 cm is melted into N identical cone whose radius is 4 cm and height is 2 cm. Then, what is the value of N?
After allowing 15% discount, a dealer wishes to sell a motor for Rs.3570. What should be the marked price of the motor?
At what rate percent per annum will a sum of money triples in 20 years on simple interest?
Alloy X contains 70% copper and 30%Â zinc. Alloy Y contains 40% copper, 25% zinc and 35% aluminum. Alloy X and Y are mixed in the ratio of 1 : 3. What is the ratio of copper and zinc in the newly formed alloy?
Five bells commence tolling together and toll at intervals of 5, 10, 15, 20 and 25 seconds respectively. In 1 hour 20 minutes, how many times do they toll together?
The following table shows yearly production of scooters (in thousands) in different factories. In which year the total production of scooters of all factories was equal to the yearly average number of scooters produced during 2015-2019?
Simple Interest received by a person 12 years on a principal of Rs. 12000 is 120 percent of the principal. What is the annual rate of interest?
A alone can do a work in 16 days and B alone can do the same work in 12 days. If they worked together on it for 4 days and then A left. How long did B take to finish the remaining work?