Question
The speed of a boat in still water is 6 km/hr more than
that of the current. The time taken by the boat to cover 875 km downstream is 17.5 hours. Find the total time taken by boat to travel 650 km downstream and 45 km upstream.Solution
Therefore, downstream speed of the boat = 875/17.5 = 50 km/hr And, upstream speed of the boat = 6 km/hr Required time taken = (650/50) + (45/6) = 13 + 7.5 = 20.5 hours
Inactive Nitrogen and Argon gases are usually used in electric bulbs in order to
Zero group was introduced by
Which part of the brain is responsible for balance and coordination?
Before X-ray examination (coloured X-ray) of the stomach, patients are given suitable salt of barium becauseÂ
Which of the following is/are correct?
1. Displacement current can exist in vacuum
2. Magnetic field can exist without electric f...
Lamberts law is related to –
The main thinking part of the brain is:
Study the given information.
Consider the force on a current carrying straight conductor in a magnetic field.
(i) It is perpendicular...
Marbles come under which category of rockes?
Which of the following part of the earth doesn’t allow the S wave to pass through itself?