1 .30 pens and 75 pencils altogether were purchased for ` 510. If the average price of a pencil was ` 2, what was the average price of a pen ?
Answer & Explanation
Answer : Option D |
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Explanation : |
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Average the price of pencil = ` 2
The price of 30 pens and 75 pencils = ` 510
Let price of a pen = ` p
So, 30 × p+ 75 × 2 = 510
30 p= 510 – 150
p= #360\over30$= 12
So, the price of a pen = ` 12 |
2 .A alone can complete a work in 18 days and B alone in 15 days. B alone worked at it for 10 days and then left the work. In how many more days, will A alone complete the remaining work ?
(A) 5 days
(B) 5$1\over2# days
(C) 6 days
(D) 8 days
Answer & Explanation
Answer : Option C |
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Explanation : |
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3 .Tapas works twice as fast as Mihir. If both of t hem together complete a work i n 12 days. Tapas alone can complete it in–
Answer & Explanation
Answer : Option B |
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Explanation : |
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Let units of work done by mihir = x So, the units of work done by topas = 2x Work completed = 12 days
So, total units of work = (x+ 2x) × 12 = 36x
Time required by Tapas to complete the
work = $36x\over2x$ = 18 day |
4 .A sum of money becomes double in 3 years at compound interest compounded annually. At the same rate, in how many years will it become four times of itself ?
Answer & Explanation
Answer : Option B |
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Explanation : |
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Money will be four times in 6 years. |
5 .At some rate of simple interest, A lent ` 6000 to B for 2 years and ` 1500 to C for 4 years and received ` 900 as interest from both of them together. The rate of interest per annum was –
Answer & Explanation
Answer : Option A |
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Explanation : |
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6 .
Answer & Explanation
Answer : Option D |
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Explanation : |
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Required number of cycles produced = 1000 + 900 = 1900 |
7 .The number of cycles produced in the 5 th week is –
Answer & Explanation
Answer : Option A |
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Explanation : |
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Required number of cycles produced = 1400 |
8 .Total number of cycles produced in five consecutive weeks is –
Answer & Explanation
Answer : Option A |
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Explanation : |
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Total number of cycle produced in 5 years
= 800 + 1300 + 1000 + 900 + 1400
= 5400 |
9 .Find the ratio of cycles produced in fourth week and third week.
Answer & Explanation
Answer : Option A |
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Explanation : |
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Required ratio = 900 : 1000 = 9 : 10 |
10 .Find the difference of cycle produced in the second week and fourth week
Answer & Explanation
Answer : Option B |
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Explanation : |
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Required difference = 1300 – 900 = 400 |
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