Question

Speed of boat is 25 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 90 km downstream?

A 3 hrs Correct Answer Incorrect Answer
B 2 hrs Correct Answer Incorrect Answer
C 5 hrs Correct Answer Incorrect Answer
D 4 hrs Correct Answer Incorrect Answer
E 6 hrs Correct Answer Incorrect Answer

Solution

Speed of stream = 25 × (80/100) = 20 km/hr Time taken to go 90 km = 90/(25 + 20) = 2 hrs

Practice Next
×
×