Question

In a freezer, the temperature falls by 5 degree Celsius in every 4 minutes . In how much time will the water kept at 30 degree Celsius freeze into ice ?

Answer 1

5 C drop in every 4 min

initially its 30

after 4 min its 25

after another 4 its 20

after another 4 its 15

after another 4 its 10

after another 4 its 5

after another 4 its 0

therefore i adding all this u get

4*6=24min

alternate method

total time taken =30/5*4

=24 min

Answer 2

Answer:

5 degree celsius takes 4 min

then 1 degree celsius will take 4/5 min

and there forw 30 degree celsius will take 4/5*5 therefore it will take 4 min

hope it helos