Question

the length of a room is 20 and the velocity is 4 km/hr a body moves the length express the velocity in mps and find the time taken​

Answer 1

Answer:

a) 20/18 b) 1/18sec

Explanation:

a) To convert km/hr into m/s , multiply the given value by 5/18 (this comes when we convert km in m by multiply it by 1000 and converting hr into sec by dividing it by 60×60sec. therefore it comes as 1000/60×60 = 5/18)

u get the value as 4×5/18 = 20/18.

b) d = 20m , v = 20/18 (converted value)

t=?

v = d /t

t = v /d

= 20/18×20

= 1/18 sec

u can convert this in min and hr by dividing it by 60 for mins and 60×60 for hrs.