If Thursday was the day before yesterday five days ago, what is the least number of days ago when Sunday was three days before the day after tomorrow. Kindly explain in detail how to approach the problem.
If S1 and S2 be the whole surface of a sphere and the curved surface of the circumscribed cylinder, then S1 is equal to
a)S2, b)2S2 c)(1/2)S2 d)(2/3)S2
Two candles have different lengths and thickness. The shorter lasts 11 hours and the longer 7 hours,when both are lit simultaneously. If after 3 hours of their being lit together at the same time, both have the same length, then what is the ratio of their original lengths?