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A sphere cube and a thin circular plate all made of the same material and having the same mass are initially heated to a temperature of 300°C. which of these cools fastest? (a) Sphere (b) Cube (c) Plate (d) None of these

A sphere cube and a thin circular plate all made of the same material and having the same mass are initially heated to a temperature of 300°C. which of these cools fastest?
(a) Sphere
(b) Cube
(c) Plate
(d) None of these

Grade:Upto college level

2 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
3 years ago
Dear student

The answer is option a

Regards
Vikas TU
14149 Points
3 years ago
Rate of cooling is directly proportional to the surface area. Here mass is same for cube , sphere and plate and all are made up of same material hence volume is same . 
For same volume surface area of  plate >cube >sphere.
Rate of cooling is maximum in plate and minimum in sphere.

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