<p>A geyser heats water flowing at a rate of 2.0 kg per minute from<span class="equation">\( 30^0C to 70^0C\)</span>. If geyser operates on a gas burner, the rate of combustion of fuel will be ___________ g <span class="equation">\(min^{-1}\)</span>.</p>

<p>[Heat of combustion = 8&nbsp;<span class="equation">\(\times10^3Jg^{-1}\)</span>, Specific heat of water = 4.2&nbsp;<span class="equation">\(Jg^{-1}\)</span>&nbsp;<span class="equation">\(^0C^{-1}\)</span>]​​​​​​​</p>