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In direct proportion,

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If the thickness of a pile of 12 cardboard sheets is 45 mm, then the thickness of a pile of 240 sheets is …………. Cm.

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If x varies inversely as y and x = 4 when y = 6, then when x = 3 the value of y is …………...

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In case of inverse proportion, .

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If the area occupied by 15 postal stamps is 60 cm², then the area occupied by 120 such postal stamps will be…………...