Question
A boat takes 270 minutes to travel 90 km in upstream.
The same boat in the same stream takes 120 minutes to travel 50 km in downstream. Find the distance travelled by the boat while travelling in still water for 360 minutes.Solution
Distance travelled by the boat while travelling in upstream for 1 hour = 90 × (60/270) = 20 km Distance travelled by the boat while travelling in downstream for 1 hour = 50 × (60/120) = 25 km So, upstream and downstream speed of the boat are 20 km/h and 25 km/h, respectively So, speed of the boat in still water = (20 + 25) ÷ 2 = 22.5 km/h So, distance travelled by the boat travelling in still water for 360 minutes = 22.5 × (360/60) = 135 km
Aflatoxin is produced by
Which of the following is not a major pigment of photosynthesis?
_____________in sugarcane refers to the phenomenon where the central shoot of the sugarcane plant starts elongating rapidly, producing a long and slende...
At what moisture content do seeds generally maintain germination for one year under normal warehouse conditions?
The tilt angle varies from ………………..degrees for a good plough.
In female reproductive system sperms are temporary stored at
The short range forecasting is issued twice a day and is valid for ………………………
The disease related with apple is known as
National Centre for Organic and Natural farming is located at ____
B-glucuronidase gene is a
Relevant for Exams:
