Question

5. A tin box 20 cm long, 20 cm wide and 30 cm
high. It contains oil upto the height of 15 cm.
How much oil is needed so that the tin is
completely filled?
(a) 6000 cu.cm (b) 1200 cu.cm
(c) 8000 cu.cm (d) 9000 cu.cm
7. The average of 4,0.4, 0.04 and 0.004 is equal to
(a) 1.004
(b) 1.111
(c) 1.044
(d) 4.444​

Answer 1

Answer: 5 . 6,000 cu.cm

Step-by-step explanation:

5. Volume of oil required = total volume - filled volume

                                           = ( 20 cm * 20 cm * 30 cm ) - ( 20 cm * 20 cm * 15 cm ) = 12,000 cu.cm - 6,000 cu.cm = 6,000 cu.cm  = 6,000 cu.cm

7. Average = sum of all / count of all

                  = ( 4.0 + 0.4 + 0.04 + 0.004 ) / 4

                  =  4.4444 / 4 = 1.1111