plz ans question no. 35 with explanation
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Answer:
the road roller is a cylinder.
therefore we have to find L.S.A
r=42 cm
h= 100 cm
L.S.A= 2×22/7×42×100
26,400 cm²
THEREFORE the area of road leveled is 26,400 cm²
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Answer:
HERE IS YOUR ANSWER.
This figure contains 1 restangle and 2 semicircles. We didnot has to find the perineter of rectangle because the two sides are inside the figure.
First find the perimeter of both the semicircles.
Diameter=7m,r=7/2
Perimeter of both semicircles
=2×pie×r
=2×22/7×7/2
=22m
Perimeter of given fig.=curved sides of both semicircles+two lengths of rectangle.
=22m+20m+20m
=64m.
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