Question

a cylindrical roller 2.5 in length 1.5 m and radius when rolls on a road was found to cover the area of 16500 square how many revolutions does it make​

Answer 1

Step-by-step explanation:

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Answer 2

$\large{ \bf\underline{GIVEN : }}$

Length of roller = 2.5 m

Radius of roller = 1.5 m

Area covered by roller = 16500 m²

we have to find revolution make by roller to cover this area

Curved Surface Area of roller

$C.S.A = 2\pi rh \\ \\ C.S.A = 2 \times \frac{22}{7} \times 1.5 \times 2.5 \\ \\ C.S.A = 23.5 {cm}^{2}$

$No. \: of \: Revolution = \frac{Coverd Area}{ Roller Area}$

$Revolution = \frac{10600}{23.5} \\ \\ \boxed{ \bf{Revolution = 702}}$