The boat went 1 hour at a speed of 40 km / h and 2 hours at a speed 10 km / h higher. The distance that he traveled

The boat went 1 hour at a speed of 40 km / h and 2 hours at a speed 10 km / h higher. The distance that he traveled is equal to A = 140 km, B = 60 km, B = 130 km, D = 50 km

1. Let’s find what distance the boat covered in the first hour:

40 * 1 = 40 km;

2. Let’s find the speed at which the boat was going in the remaining two hours:

40 + 10 = 50 km / h;

3. Let’s calculate what distance the boat covered in two hours:

2 * 50 = 100 km.

4. Let’s find how many kilometers the boat has covered:

40 + 100 = 140 km.

Answer: A – 140 km.