A certain number of persons can complete a work in 54 days. If there were 15 persons less, it would take 18 days more for the work to be completed. Initially, the number persons is:
A buys an article for Rs.900 and sells it to B at a profit of 25%. B sells it to C, who sells it for Rs.1,350, at a loss of 10%. What profit percent (to the nearest integer) did B make?
Sachin alone can complete a piece of work for Rs. 8,500 in \(8\frac{1}{2}\) days. But with the help of Vishnu, the work is completed in 6 days. The share to be paid to Vishnu is:
A vertical stick 12 cm long casts a shadow 8 cm long on the ground. At the same time, a tower casts a shadow 40 m long on the ground. The height of the tower