If A, B, and C are the angels of a △ABC then the following is equal to :sin\(({B+C \over2})\)
20 men can finish a work in 30 days. They started working, but 4 men left the work after 10 days. In how many days would the work be completed?
If \(sin {πx\over 2}=x^2-2x+2\), then the value of x is
A is 40% more efficient than B. If B finishes a work in 14 days , then in how many days will A finish the same work?
A shopkeeper allows 18% discount on the marked price of an article and still makes a profit of 25%. If he gains ₹106.6 on the sale of the article, then what is the marked price of the article?