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6. A rectangle whose sides are in the ratio 6:5 is formed by bending a circular wire of radius 21cm. Find the difference between the length and breadth of the rectangle?
A. 6 cm
B. 8 cm
C. 10 cm
D. 12 cm
Ans. A
7. If the length of the rectangle is increased by 20%, by what percent should the width be reduced to maintain the same area?
A. 21.33
B. 33.33
C. 13.37
D. 16.67
Ans. D
8. Varun and Madhav can together finish a work in 30 days. They worked together for 20 days and then Madhav left. After another 20 days, Varun finished the remaining work. In how many days Varun alone can finish the work?
A. 60
B. 35
C. 50
D. 45
Ans. A
9. The radius of the wheel of a car is 70 cm. How many revolutions per minute the wheel will make in order to keep a speed of 66 km/hr?
A. 234
B. 272
C. 225
D. 250
Ans. D
10. 5 men and 12 boys finish a piece of work in 4 days, 7 men and 6 boys do it in 5 days. The ratio between the efficiencies of a man and boy is?
A. 1:2
B. 2:1
C. 2:3
D. 6:5
Ans. D
11. Express 25 mps in kmph?
A. 15 kmph
B. 99 kmph
C. 90 kmph
D. None
Ans. C