एक खंभे की कुल लंबाई कितनी है यदि उसका एक-तिहाई हिस्सा जमीन के नीचे है, एक-चौथाई हिस्सा पानी में डूबा हुआ है, और शेष 5 मीटर पानी के ऊपर दिखाई दे रहा है?

If 2 is subtracted from each of the numerator and the denominator of a fraction ab, it becomes 14. If 17 is added to the numerator and 8 is added to the denominator of the original fraction, then the fraction becomes 1. What is the value of (4a - b)?

One-third of the boys and one-half of the girls of a college participated in a social work project. If the total number of participating students is 300, out of which 100 are boys, what is the total number of students in the college?