Question

A motor boat travels of 25 km in an hour. It need to reach the dock in 7 hours. If the dock is at a distance of 200 km from the motor boat, will it be able to reach the dock in time?

Answer 1

Distance covered by motor boat in 1 hour = 25 km
Distance covered by motor boat in 2 hour = 25 +25 = 50 km Distance covered by motor boat in 3 hour
= 25 + 25 + 25 = 75 km
Similarly,
Distance covered by motor boat in 7 hour
= 25 + 25 + 25 +25 + 25 + 25 + 25 = 175 km
Distance of dock from the boat = 200 km
Distance of dock from the boat > Distance covered by the motor boat in 7 hours
So, boat will not be able to reach the dock at time if it travels 25 km in an hour.