By the Euler's relation for polyhedra, We know that
F+V=E+2
Given mumber of edges = 15
Number of vertices = 10
the number of faces = x
Now putting these values in the Euler's relation, we get
F+V=E+2
x+10=15+2
x=15+2−10
x=7
3x-12 = 3×7-12=9
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120 Mins English English20 Questions20 Marks15 Mins English English200 Questions200 Marks120 Mins EnglishIn a school, after prayer classes start at 8:25 am. If each period is of 35 minutes, then fourth period will start at
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