The ratio of the speed of the boat itself to the speed of the river flow is 8: 1. Find the speed of the boat itself and the speed

The ratio of the speed of the boat itself to the speed of the river flow is 8: 1. Find the speed of the boat itself and the speed of the river flow if the boat sails 45 km along the river in 2.5 hours

Let’s take the speed of the river as “x”, then the speed of the boat is 8 * x, according to the condition of the problem. Let’s make an equation with one unknown. The path traveled along the river = (Speed of the boat + the speed of the river) * travel time. 45 = (x + 8x) * 2.5 9x * 2.5 = 45 9x = 45: 2.5 = 18 x = 18: 9 x = 2 km / h river speed. Boat speed = 2 * 8 = 16 km / h
Response 2 km / h and 16 km / h