[PP Sub Inspector 17 Aug 2021]
1. Find the approximate mean proportional between 7.5 and 98.2.
27
112
12
53
2. The length of each side of a cube is 12 cm. What is the total surface area of the cube ?
432 cm2
1728 cm2
216 cm2
864 cm2
3. A cylindrical vessel 80 cm in diameter is partially filled with a liquid. A sphere having radius 30 cm is dropped into the vessel. To what further height will the liquid in the cylinder rise?
110 cm
50 cm
22.5 cm
30 cm
4. What is the sum of the digits that a perfect square can never have at its units place ?
20
22
8
15
5. Manish earned a profit of 49% on the first laptop he sold and suffered a 49% loss on the second one. He sold both the laptops at $ 9900 each. What is the net loss or profit in percentage?
24.01% loss
1% profit
24.01% profit
1% loss