Average temperature from Monday to Thursday is 48^{circ} C and from Tuesday to Friday is 52^{circ} C

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The average temperature from Monday to Thursday is $48^{\circ} C$ and from Tuesday to Friday is $52^{\circ} C$. If the temperature on Monday is $42^{\circ} C$, what was it on Friday? (in $^{\circ} C$)

A

$52$

B

$55$

C

$58$

D

$51$

Solution

Temperature on Monday $+$ Tuesday $+$ Wednesday $+$ Thursday $=4 \times 48^{\circ}=192^{\circ}$

Temperature on Monday $=42^{\circ}$

$\therefore \quad$ Tuesday $+$ Wednesday $+$ Thursday

$=\left(192^{\circ}-42^{\circ}\right)=150^{\circ}$

Temperature on Tuesday $+$ Wednesday $+$ Thursday $+$ Friday $=4 \times 52^{\circ}=208^{\circ}$

$\therefore$ Friday's temperature $=208^{\circ}-150^{\circ}=58^{\circ}$

Standard 13

Quantitative Aptitude

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