A man starts climbing hill. Every minute he ascends 20 yards but slips down 5 yards. How long will he take to touch a point of 80 yards height?
ক. 5 minutes
খ. 5 minutes 20 seconds
গ. 6 minutes
ঘ. 7 minutes
উত্তর: 5 minutes
ব্যাখ্যা: Shortcut Formula : T = H- A/A- S + 1 Where : T = Total time H = Total height (80 yards) A = Ascent per minute (20 yards, assumed) S = Slip down per minute (5 yards) T = 80−20/20-5 + 1 = 60/15 + 1 = 4+ 1 = 5 minutes.
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A man starts climbing hill. Every minute he ascends 20 yards but slips down 5 yards. How long will he take to touch a point of 80 yards height?
- ক.5 minutes
- খ.5 minutes 20 seconds
- গ.6 minutes
- ঘ.7 minutes
উত্তর