Question

if the lift use 5 sec for 1 st floor ,how many time he want to go in 19th floor
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Answer 1

Answer:95secs

Step-by-step explanation:

1st floor=5sec

Then,

19th floor=

5 *19=95 secs

Answer 2

Answer:

5sec=1

?=19

let second is equals to X and floor is equals to y

X is inversely proportional to y

x=ky

5=k×1

k=5/1=5

X is inversely proportional to y

x=ky

s=5×19=95second