Question

Every floor of a 20 storey building is 5 meter high. If a lift moves 3 meter every second. How long will it take to move
from 3rd floor to 12th floor?
a. 22 seconds
b. 15 seconds
c. 25 seconds
d. 10 seconds​

Answer 1

Answer:

b. 15 seconds

Step-by-step explanation:

3rd to 12th = 9 floors

so the total height = 45

then,

the time taken by the lift is = 45/3 = 15

thus , 15 seconds