The temperature of two bodies measured by thermometer are t1=20°C±0.5°C and t2=50°C±0.5°C. The temperature difference and the error is.

Here,t1=20∘C±0.5∘Ct2=50∘C±0.5∘CThe temperature difference of two bodies ist=t2−t1=50∘C−20∘C=30∘CThe error in temperature difference is given byΔt=Δt1+Δt2=0.5∘C+0.5∘C=1∘C∴ The temperature difference is 30∘C±1∘C