Question
Speed of a boat in still water is 18 km/h while the
speed of the stream is ____ km/h. Total time taken by the boat to go 180 km upstream and 270 km downstream is ____ hours. The values given in which of the following options will fill the blanks in the same order to make the above statement true: A. 7, 27.75 B. 9, 30 C. 5, 25 D. 10, 28.5Solution
According to the question: For A: Speed of boat = 18 km/h Speed of stream = 7 km/h Speed in upstream = 18 - 7 = 11 km/h Speed in downstream = 18 + 7 = 25 km/h Total time = 180/11 + 270/25 ≈ 16.36 + 10.8 ≈ 27.16 hours So, A can't be the answer. For B: Speed of boat = 18 km/h Speed of stream = 9 km/h Speed in upstream = 18 - 9 = 9 km/h Speed in downstream = 18 + 9 = 27 km/h Total time = 180/9 + 270/27 = 20 + 10 = 30 hours So, B can be the answer. For C: Speed of boat = 18 km/h Speed of stream = 5 km/h Speed in upstream = 18 - 5 = 13 km/h Speed in downstream = 18 + 5 = 23 km/h Total time = 180/13 + 270/23 ≈ 13.85 + 11.74 ≈ 25.59 hours So, C can't be the answer. For D: Speed of boat = 18 km/h Speed of stream = 10 km/h Speed in upstream = 18 - 10 = 8 km/h Speed in downstream = 18 + 10 = 28 km/h Total time = 180/8 + 270/28 = 22.5 + 9.64 ≈ 32.14 hours So, D can't be the answer.
‘Shamsher Khan’ who passed away recently, is associated with __________Â
Loan repayment by instalment payments is called as -
Which company partnered with Bajaj Allianz General Insurance to offer a firecracker insurance policy for Diwali 2024?
Which of the following player is not associated with shooting
Which script is Hindi written in?Â
The Narayanpur Fair is celebrated in which Indian state?
Where did INC Split for the first time?
The base year of Sensex is 1978-79 and the base value is 100
Which of the Indian Port is also known as the ‘Queen of Arabian Sea’?
Vishni Devi Shah, Kunti Verma, Jeevanti, Mangala, and other women played a significant role in hoisting the tricolor at the municipal building of Almora...
