PROBLEM # 2
For a party, you made 10 conical hats out of cardboard. How much cardboard did you use in total if each cap has a radius of 15 cm and a slant height of 25 cm?

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Problems from 03/29/12

PROBLEM #1
A train averaged 120 km/h for the first two thirds of a trip (in distance) and 100 km/h for the whole trip. Find its average speed for the last third of the trip.

SOLUTION 1
75 km/h.

PROBLEM #2
Find the volume of a solid bounded by the graph z=8-2x-4y and below by the xy-plane for (x,y) in the unit square

SOLUTION 2
5.

Congratulations to Aseem Chandawarkar and Kishore Balsara, who were the winner of the last set of puzzles.