RRB JE 31st May 2019 Shift-3
For the following questions answer them individually
If A, B are two natural numbers >1 and their H.C.F is 1, then which of these statements is always TRUE?
If the speed of sound in air is 344 m/s at $$22^\circ$$ C, and the minimum time interval between sound and echo is 0.1 s for a distinct echo, what is the distance the sound should travel from source to reflecting surface and then back to ear?
If 4 years are subtracted from the age of a person and divided by 5, the result gives his grandson's age. The grandson now has a sister aged 5, six years younger to him. How old is the grandfather?
A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth. Find the percentage of decrease in its area.
A man facing north turns 135 degrees in the anti-clockwise direction and then 180 degrees in the clockwise direction. Which direction is he facing now?
