(a) ax: by
(b) a/x:b/y
(c) ay: bx
(d) x/a ∶b/y
Q2. The area of a rhombus is 150 cm^2. The length of one of its diagonals is 10 cm. The length of the other diagonal is:
(a) 25 cm
(b) 30 cm
(c) 35 cm
(d) 40 cm
Q3. One of the diagonals of a rhombus is double the other diagonal. Its area is 25 sq. cm. The sum of the diagonals is:
(a) 10 cm
(b) 12 cm
(c) 15 cm
(d) 16 cm
Q4. Each side of a rhombus is 26 cm and one of its diagonals is 48 cm long. The area of the rhombus is:
(a) 240 cm^2
(b) 300 cm^2
(c) 360 cm^2
(d) 480 cm^2
Q5. The area of a field in the shape of a trapezium measures 1440 m^2. The perpendicular distance between its parallel sides is 24 m. If the ratio of the parallel sides is 5 : 3, the length of the longer parallel side is:
(a) 45 m
(b) 60 m
(c) 75 m
(d) 120 m
Q6. A man can reach a certain place in 30 hours. If he reduces his speed by 1/15th, he goes 10 km less in that time. Find his initial speed per hour.
(a) 6 km/hr
(b) 5 1/2 km/hr
(c) 4 km/hr
(d) 5 km/hr
Q7. The length of the minute's hand of a clock is 8cm. Find the distance travelled by its outer end in 15 minutes.
(a) 4 πcm
(b) 8 πcm
(c) 12 πcm
(d) 16 πcm
Q11. In Arun’s opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun’s weight is greater than 60 kg but less than 70 kg. His mother’s view is that his weight cannot be greater than 68 kg. If all of them are correct in their estimation, what is the average of different probable weights of Arun?
(a) 67 kg
(b) 68 kg
(c) 69 kg
(d) None of these
Q12. The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?
(a) 0
(b) 1
(c) 10
(d) 19
Q14. The average of 7 consecutive numbers is 20. The largest of these numbers is:
(a) 20
(b) 22
(c) 23
(d) 24
Q15. The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is:
(a) 15 years
(b) 15.5 years
(c) 16 years
(d) Cannot be computed with the given information
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