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1-2

2-3

3-4

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54213

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**1. A tap can empty a tank in 30 minutes. A second tap can empty it in 45 minutes. If both the taps**

**operate simultaneously, how much time is needed to empty the tank?**

(a) 18 minutes

(b) 14 minutes

(c) 15 minutes

(d) 30 minutes

**2. The perimeter of one face of a cube is 20 cm. Its volume will be**

(a) 100 cm

^{3}
(b) 125 cm

^{3}
(c) 400 cm

^{3}
(d) 625 cm

^{3}**3. If the area of a circle is A, radius of the circle is r and circumference of it is C, then**

(a) rC = 2A

(b)

^{C}/_{A }=^{r}/_{2}
(c) AC = r

^{2}/4
(d)

^{A}/_{r}= C**4. A square is inscribed in a quarter–circle in such a manner that two of its adjacent vertices lie on the**

**two radii at an equal distance from the centre, while the other two vertices lie on the circular arc. If the**

**square has sides of length x, then the radius of the circle is**

(a)

^{16x}/_{π + 4}
(b)

^{2x}/_{√π}
(c)

^{√5x}/_{√2}
(d) √2x

**5. 10% discount and then 20% discount in succession is equivalent to total discount of**

(a) 15%

(b) 30%

(c) 24%

(d) 28%

**6. The marked price of a watch was Rs.720. A man bought the same for Rs.550.80 after getting two**

**successive discounts, the first being 10%. The second discount rate is**

(a) 12%

(b) 14%

(c) 15%

(d) 18%

**7. Allowing 20% and 15% successive discounts, the selling price of an article becomes Rs.3,060; then the**

**marked price will be**

(a) Rs.4,400

(b) Rs.5,000

(c) Rs.4,500

(d) Rs.4,000

**8. Eighteen years ago, the ratio of A's age to B's age was 8 : 13. Their present ratio's are 5 : 7. What is the**

**present age of A?**

(a) 70 years

(b) 50 years

(c) 40 years

(d) 60 years

**9. 729 ml of a mixture contains milk and water in the ratio 7 : 2. How much more water is to be added to**

**get a new mixture containing milk and water in the ratio 7 : 3 ?**

(a) 60 ml

(b) 71 ml

(c) 52 ml

(d) 81 ml

**10. The average weight of 15 oarsmen in a boat is increased by 1.6 kg when one of the crew, who**

**weighs 42 kg is replaced by a new man. Find the weight of the new man (in kg).**

(a) 65

(b) 66

(c) 43

(d) 67

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