The average temperature of Mon, Tue, Wed and Thurs is 31°C and the average temperature of Tue, Wed, Thurs and Fri is 29.5°C. If the average temperature of Mon was 37\(\frac{1 }{2}\)% more than the average temperature of Friday, find the temperature of Monday.

22° C

Total temp. of Mon, Tues, Wed & Thur. = 31 × 4 = 124 ........... (i)

Total temp. of Tues, Wed, Thur & Fri. = 29.5 × 4 = 118 ........... (ii)

Subtracted- (ii) - (i)

Mon. - Fri. = 6

37 \(\frac{1}{2}\)% = \(\frac{3}{8}\)

it means, temperature of ;

Mon :    Fri. = 11 : 8 (difference = 3R)

3R = 6

1R = 2,

Therefore, Temperature of Monday = 11 × 2 = 22°