Exam Maths Puzzle Logical Reasoning

plays+well=better

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A plane left half an hour later than the scheduled time and in order to reach its destination 1500 kilometers away in time, it had to increase its speed by 33.33 percent over its usual speed. Find its increased speed.

Sphere Radius=10.5cm
After melting the sphere we make a cuboid of it.
What will be the maximum surface area of the cuboid?