Question

A body cooling from 70 to 50 c in 1 minute the time taken to cools same body from 50 to 40 c is

Answer 1

70 - 50 = 20 --- 1
it takes 1 minutes
50 - 20 = 10 ----2
from 1 and 2
10/20 = 0.5
30 seconds

Answer 2

30 sec because in
1min it 20 c is decreased than
in 30 sec 10 c is decreased