hi ppl......
would be grateful if u could help me out with these probs...
dont have the certain ans for any of the qs...
1. A cubic object 3"x3"x3" is painted red on all the outside surfaces, including the top and bottom. If the cube is cut into 27 cubes of 1"x1"x1" then
a. how many cubes had 3 sides red painted
b. how many cubes had 2 sides red painted
c. how many cubes had 1 sides red painted
d. how many cubes had 0 sides redpainted
Ans: a.=8, b=12, c.=6, d.=1(not sure)
3. My rack contains 8 Red colour ties, 13 violet colour ties,10 Blue colour ties, 5 Pink colour ties, 4 green colour ties. If there is no electricity and i want atleast two ties of the same colour then how many ties should i take out from my rack?
4. Two trains are leaving from two stations seperated by 50 miles. With a constant speed of 60 miles per hour, the trains are approaching each other on different tracks. if length of each train is 1/6th of a mile, when they meet how much time do they need to pass each other totally?
thanx a ton
bye