In a constant volume gas thermometer, the pressure of the gas is 70...

For a constant volume gas thermometer, the pressure of the gas is directly proportional to its absolute temperature.

$\dfrac{P_1}{T_1} = \dfrac{P_2}{T_2}$

Given:
Pressure at ice point, $P_1 = 70 \text{ kPa}$
Absolute temperature at ice point, $T_1 = 273.15 \text{ K}$
Absolute temperature at steam point, $T_2 = 373.15 \text{ K}$

Substituting the values:

$P_2 = 70 \times \dfrac{373.15}{273.15}$

$P_2 \approx 70 \times 1.366$

$P_2 \approx 95.62 \text{ kPa}$

Rounding to the nearest integer, the pressure at the steam point is $96 \text{ kPa}$.