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An amount doubles itself in 3 years.
An amount doubles itself in 3 years. When This amount can become 8 times of itself?
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A work is done by two people in 24 min. one of them can do this work a lonely in 40 min. how much time required to do the same work for the second person.
In 1 minute (A+B) can do 1/24 work. A alone can 1/40 work in 1 minuteB alone can do in 1 minute = (A+B)’s – A’s = 1/24 – 1/40 = 1/60 workTherefore, b can do the same work in = 60 min
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Two pencils costs 8 cents, then 5 pencils cost how much ?
2 pencils = 8 cents => 1 pencil = 4 cents. Therefore 5 pencils cost = 5 * 4 = 20 cents