A boat running upstream takes 8hours41minutes to cover a certain distance, while it takes 4hours to cover the same distance in running downstream. What is the ratio between the speed of the boat and the speed of stream?
Given a right-angled ΔABC. The lengths of the sides containing the right angle are 35cm and 12cm. A circle is inscribed in ΔABC. Find the radius of the circle.
A building is in form of a right circular cylinder and cone as shown in the picture. The radius of cone and cylinder is 4 meters. The height of cylinder and cone are 8 meters and 3 meters respectively. Find the outer surface area of the building. (Assume π =
Laura and Deborah each have a bag that contains one ball each of the colors yellow, blue, pink, black and green. Laura randomly selects a ball from her bag and puts it in Deborah's bag. Then Deborah randomly selects a ball from her bag and puts it in Laura's bag. What is the probability that after this the contents of the bag are the same as before?
In the following diagram rectangle represents men, triangle represents teachers, circle represents rural and square represents sports persons. Find number of men who are rural.