The slant height of a right circular cone is 15 m and its height is 9 m. The area of its curved surface, is:
(A) 169 π m2
(B) 172 π m2
(C) 165 π m2
(D) 180 π m2
A hollow copper pipe is 22 cm long and its external diameter is 28 cm. If the thickness of the pipe is 3 cm and iron weighs 8.5 g/cm3 , then the weight of the pipe is closest to:
(A) 34 kg
(B) 44 kg
(C) 14 kg
(D) 24 kg
The difference between a fraction and its reciprocal is 9/11. If the cubes of both the fraction and its reciprocal are considered, what will be the difference between them?
(A) 3996/1331
(B) -1331/2538
(C) 729/1331
(D) -2538/1331
If 3 added to both the numerator and the denominator, the fraction becomes 10/11 when 4 is subtracted from both the 4 numerator and the denominator of the same fraction, it becomes ¾. What is the value of the fraction?
(A) 3/5
(B) 7/8
(C) ¾
(D) 6/13
The average weight of 8 people increase by 2.5 kg when a new person comes in place of one of them weighting 75 kg. What is the weight of the new person?
(A) 95 kg
(B) 75 kg
(C) 85 kg
(D) 65 kg
A sum of Rs.10600 is divided among P, Q, R in such a way that P gets Rs.1400 more than what Q gets and Q gets Rs.1600 more than what R gets. The ratio of their shares is
(A) 16: 9: 18
(B) 27: 18: 10
(C) 18: 25: 10
(D) 16: 25: 10
Ten different letters of alphabet are given, words with 5 letters are formed from these given letters. Then, how many such words can be formed which have at least one letter repeated ?
(A) 69760
(B) 69970
(C) 67960
(D) 65760
(E) 69790
If in a sale, the discount given on a saree is equal to one-fourth of the marked price and the loss due to this discount is 15%, then the ratio of the cost price to the selling price is-
(A) 3 : 4
(B) 20 : 17
(C) 15 : 17
(D) 12 : 13
The median of 31, 25, 17, 23, 45 and 59 is:
(A) 23
(B) 25
(C) 31
(D) 28
If
(A) 1
(B) 0
(C) -1
(D) 2
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