Q21. The length of a rectangular field is twice its breadth. If the perimeter of the field is 150 metre, find its lenght :

• 40 metre
• 50 metre
• 60 metre
• 80 metre

Q22. Find the square root of 0.000169 :

• 0.013
• 0.13
• 0.0013
• 0.017

Q23. Convert a speed of 10 m/s into km/h :

• 20 km/h
• 30 km/h
• 36 km/h
• 45 km/h

Q24. 96 % of the cost of a TV is Rs. 10,464.00. What is its total cost ?

• Rs. 10,680.00
• Rs. 10,900.00
• Rs. 12,000.00
• Rs. 12,500.00

Q25. If (3a + 7b) : (5a - 3b) = 5:3, a:b will be :

• 9:4
• 7:3
• 9:5
• None of these

Q26. A sum of money at simple interest doubles itself in 10 years. Find the rate of interest per annum.

• 8 %
• 15 %
• 10 %
• 12.5 %

Q27. A alone can finish a piece of work in 12 days and B alone can do it in 15 days. How much time will they take to finish this work if they work together ?

• 6 * 1/2 days
• 6 * 2/3 days
• 8 days
• 8 * 1/2 days

Q28. A man bought an article for Rs. 850.00 and sold it at a gain of 8 %. For how much did he sell it ?

• Rs. 900.00
• Rs. 950.00
• Rs. 930.00
• Rs. 918.00

Q29. If the diameter of a circle is 14 cm, what is the value of its circumference ?

• 44 cm
• 32 cm
• 22 cm
• 38 cm

Q30. How many 3 cm long cubes can be cut from a cube whose each edge is 15 cm in length ?

• 90
• 120
• 125
• 150