cube face trick ssc question
A cube of edge 6
cm is painted on all sides and then cut into unit cubes. The number of unit
cubes with no sides painted is?
a. 0
b. 64
c. 186
d. 108
algebra question solved ssc
If a+b+1 = 0, then the value of (a 3 + b 3 + 1 – 3ab) is? a. 3 b. 0 c. -1 d. 1
The diameter of a roller is 84 cm and its length is 120 cm. It makes 500
ReplyDeletecomplete revolutions to move once over to a level a playground. Find the area
of the play ground. ANS 1580 Sq. m
Explain how ???
Lateral surface area of roller
Delete=2πrh
=2*22/7*42*120
=31680sq.cm
Area of play ground
=31680*500
=15840000sq.cm
Convert sq.cm into sq.m
=15840000//10000
=1584sq.m
multiply no of revolution to surface are of roller to find the area of play ground
ReplyDelete