q: Calculate the circumference of a circular field whose radius is 7 centimeters.
Options:
(A) 11 cm
(B) 15 cm
(C) 1 cm
(D) 4 cm
(E) 14 cm
a: Circumference C is given by
C = 2r = 2*7 = 14 cm The answer is (E).
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q: In what time will a bus 200 m long cross in the road, if its speed be 72 km/hr?
Options:
(A) 15
(B) 20
(C) 14
(D) 10
(E) 12
a: Speed = 72 * 5/18 = 20 m/sec
Time taken = 200/20 = 10 sec. The answer is (D).
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q: A man sells two articles for Rs.3600 each and he gains 30% on the first and loses 30% on the next. Find his total gain or loss?
Options:
(A) 9
(B) 8
(C) 7
(D) 5
(E) 3
a: (30*30)/100 = 9%loss The answer is (A).
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q: 150 is increased by 40%. Find the final number.
Options:
(A) 200
(B) 210
(C) 180
(D) 190
(E) 220
a:
Final number = Initial number + 40%(original number) = 150 + 40%(150) = 150 + 60 = 210. The answer is (B).
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