A train travels at a constant speed and crosses two persons moving in the
same direction in 10.8 seconds and 11.4 seconds respectively. The first one
was running at the speed of 4.8 km/h while the second one was running at
the speed of 6.6 km/h. What is the speed of the train in km/h?
A ladder leads to a window which is 48 feet above the ground on one side of the street (one side). From that place, the ladder reaches the window on the other side of the street (second side) 55 feet above the ground. If the length of that ladder is 73 feet, find the width of the street.
Consider the following question and decide which statement is sufficient to answer the question.
Question: Find the value of p.
Statement:
1. p : p2 :: p2 :1000
2. p2 + 2pn + n2 = 21
Three pipes A, B and C can fill an empty tank in 15, 10 and 5 minutes respectively. When the tank is empty, the three pipes are opened simultaneously. What is the part of work done by B and C?
The mean of the four numbers is 22. The mean of the three smallest numbers is 19. If the data range is 15, what will be the mean of the largest three numbers?
