Subject :NSO Class : Class 5
A beaker of iced water was heated until it boiled. It was then left to cool to room temperature. The temperature of the water was taken at intervals of four minutes and the results were used to draw the graph as shown in the given figure. Approximately how long did the boiling water take to cool to room temperature ?
(A) 6 minutes
(B) 12 minutes
(C) 16 minutes
(D) 28 minutes
pl explain.
Ans 1:
Class : Class 7