The Speed of the ship in calm water is five times the speed of the stream. If the ship can travel 's + 30' km downstream or 's - 10' km upstream in 5 hours, determine the time it takes for the ship to cover '4s - 170' km in still water.
ATQ, Downstream speed of the Ship = (s + 30)/5 = ‘0.2s + 6’ km/h Upstream speed of the Ship= (s – 10)/5 = ‘0.2s – 2’ km/h Speed of the stream = (0.2s + 6 – 0.2s + 2)/2 = 4 km/h Speed of the ship in still water = 5 × 4 = 20 km/h According to question: 0.2s + 6 = 20 + 4 0.2s = 18 s = 90 So the time taken by the ship to cover ‘4s – 170’ km in still water = (4 × 90 – 170)/20 = 9.5 hours = 9 hours 30 minutes
The critical limit for NO3-N (mg/litre) in drinking water (as per WHO standard is:
Which type of meristem is responsible for the increase in girth or thickness of plants?
What will be the approx. plant population of wheat crop sown in 1 acre area if there are 50 plants in quadrate with each side 1m long?
Which system of planting is most suitable for sloppy lands in hilly areas?
________ is found in the tissues of ripening fruits and stem nodes. It promotes fruit ripening and leaf abscission.
Which of the following are damaging stage of Aphid?
Bent neck is an important physiological disorder of which of the following flower crop?
Which combination insect and symptom of damage is wrong?
Mutations are.................?
Which of the following is not a function of Auxin?
