State 'T' for true and 'F' for false.
(i) The rational number lies neither to the right nor to the left of zero on the number line.
(ii) The rational numbers are on the opposite sides of 0 on the number line.
(iii) 0 is the smallest rational number.
(iv) For every rational number x, x + 1 = x.
'A' is the correct answer as 0 is the smallest rational number
An elevator descends into a mine shaft at the rate of 8 m/min. If the descend starts from 12 m above the ground level, how long will it take to reach –468 m?
A 60 mins
B 30 mins
C 50 mins
D 10 mins
Option A as -468m 12m = 480m (overall distance to be covered) and then divide it by 8 as the distance covered by elevator in 1 minute is 8. So, -480/8 = 60. Overall equation is (-468) (-12)=480/8=60 minutes. Thank You.K.V.Bargarh.