Physics · 2022
JEE Main · 26 June 2022, Shift 2 · Q54
A geyser heats water flowing at a rate of 2.0 kg per minute from 30^° C to 70^° C. If geyser operates on a gas burner, the rate of combustion of fuel…
A geyser heats water flowing at a rate of $\displaystyle 2.0$ kg per minute from $\displaystyle 30^{\circ} \mathrm{C}$ to $\displaystyle 70^{\circ} \mathrm{C}$. If geyser operates on a gas burner, the rate of combustion of fuel will be
\_\_\_\_ $\displaystyle \mathrm{g} \min ^{-1}$
[Heat of combustion $\displaystyle =8 \times 10^3 \mathrm{Jg}^{-1}$,
Specific heat of water $\displaystyle \left.=4.2 \mathrm{Jg}^{-1}{ }^{\circ} \mathrm{C}^{-1}\right]$
Official answer
42
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