Taniya heated a beaker of iced water until it started
boiling. She boiled it for few minutes and then left
it to cool down at room temperature. She recorded
the temperature of water at intervals of five minutes
and used the results to draw the graph as shown in
the given figure. Approximately how long did the
boiling water take to cool to the room temperature?
A20 minutes
B10 minutes
C15 minutes
D30 minutes
Sof olympiad trainer worse website bcz they didn't give solutions in some papers. No good feedback