A motorboat whose speed is 20 km/h in still water takes 30 minutes more to go 24 km upstream than to cover the same distance downstream. If the speed is increased by 2 km/h, how much time will it take to go 39 km downstream and 30 km upstream?
AB is a diameter of a circle with centre O. A tangent is drawn at point A. C is a point on the circle such that BC produced meets the tangent at P. If ∠APC = 62°, find the measure of minor arc AC.
A can finish a piece of work in 16 days, B can finish it in 12 days. They worked together for 4 days, then A left. B finished the rest. How many total days did B work to finish the work completely?
A solid cube of side 8 cm is dropped into a rectangular container of length 16 cm, breadth 8 cm and height 15 cm which is partly filled with water. If the cube is completely submerged, then the rise of water level (in cm) is ?
The following graph shows export of cars of type A and B (in millions) from 2014 to 2018. What is the ratio of total exports of type A cars in 2014 & 2017 to type B in 2015 & 2016?