- 80 minutes
- 50 minutes
- 60 minutes
- 90 minutes

Option 1 : 80 minutes

**Given:**

Speed of boat in still water = 18 km/hr

Speed of stream = 6 km/hr

Distance travelled by the boat = 16 km

**Formula used:**

Speed of boat against to stream = Speed of boat in still water - Speed of stream

**Calculation:**

According to the question

Speed of boat against the stream = 18 - 6 = 12 km/hr

We need to travel 16 km against to the stream

Time = Distance travel/Speed against to the stream

⇒ Time, to travel against the stream = 16/12 = 4/3 hours

⇒ Time = 80 minutes

**∴ The time taken to travel against the stream is 80 minutes.**

India’s **#1 Learning** Platform

Start Complete Exam Preparation

Daily Live MasterClasses

Practice Question Bank

Mock Tests & Quizzes

Trusted by 2,18,86,739+ Students

Testbook Edu Solutions Pvt. Ltd.

1st & 2nd Floor, Zion Building,

Plot No. 273, Sector 10, Kharghar,

Navi Mumbai - 410210

[email protected]
Plot No. 273, Sector 10, Kharghar,

Navi Mumbai - 410210

Toll Free:1800 833 0800

Office Hours: 10 AM to 7 PM (all 7 days)