document.write( "Question 48683: 1. The wheel of a wheelbarrow rotates 60 times when it is pushed a distance of 50 metres. Calculate the radius of the wheel, giving you answer to the nearest millimetre.\r
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Algebra.Com's Answer #32216 by atif.muhammad(135) $\"\"$ $\"About$

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document.write( "1. The wheel of a wheelbarrow rotates 60 times when it is pushed a distance of 50 metres. Calculate the radius of the wheel, giving you answer to the nearest millimetre. \r\n" );
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document.write( "60 rotations = 50 metres\r\n" );
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document.write( "1 rotation =  metres\r\n" );
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document.write( "Hence, the circumference of the wheel barrow is  m.\r\n" );
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document.write( "Circumference = Pi x diameter  OR Pi x (2 x radius)\r\n" );
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document.write( " = Pi x 2 x radius\r\n" );
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document.write( "Radius =  = 0.1326 m or 0.133m (3 signficant figures)\r\n" );
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document.write( "2. The wheel on Pip's bicycle has a diameter of 66 cm. Pip cycles a distance of 1000 cm. How many complete rotations does the wheel make?\r\n" );
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document.write( "Circumference of bicycle wheel = Pi x diameter = 207.345cm\r\n" );
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document.write( "So in 1 rotation, his bike will travel 207.345 cm\r\n" );
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document.write( "207.345 cm = 1 rotation\r\n" );
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document.write( "1 cm =  rotations\r\n" );
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document.write( "1000 cm =  rotations = 4.82 rotations\r\n" );
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document.write( "Hence, he makes 4 complete rotations, he has only made 0.82 of the 5th rotation.\r\n" );
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