For the following questions answer them individually
P and Q are two points on a circle with centre at O. R is a point on the minor arc of the circle, between the points P and Q. The tangents to the circle at the points P and Q meet each other at the point S. If ∠PSQ = 20°, ∠PRQ = ?
The value of a machine depreciates every year by 10%. If its present value is 50,000 then the value of the machine after 2 years is
A can finish a work in 18 days and B can do the same work in 5 days. B worked for 2 days and left the job. In how many days, A alone can finish the remaining work?
A man can swim 3 km/hr. in still water. If the velocity of the stream is 2 km/hr., the time taken by him to swim to a place 10 km upstream and back is :
It 10 men or 20 women or 40 children can do a piece of work in 7 months, then 5 men, 5 women and 5 children together can do half of the work in :
A shopkeeper marks the price of an article at 80. What will be the selling price, if he allows two successive discounts at 5% each ?