Average Temperature-RRB

Average Temperature

The mean temperature of Monday to Wednesday was 37 degree celsius and that of Tuesday to Thursday was 34 degree Celsius. If the temperature on Thursday was 4/5th that of Monday. The temperature on Thursday was?

Ans-

Let temperature of Monday = a

Temperature of Tuesday = b

Temperature of Wednesday =c

Temperature of Thursday = 4a/5
Sum of temperatures of Monday to Wednesday = 3×37 = 111
=> a+b+c=111….(1)
Sum of temperatures of Tuesday to Thursday = 3×34 = 102
b+c+4a/5 = 102 —(2)

(1)-(2)=>a−4a/5 = 111−102
Hence a/5=9
=>a=45
Temperature on Thursday = 4a/5=(4×45)/5=36

Ex-2

The average temperature on Wednesday, Thursday and Friday was 25circ. The average temperature on Thursday, Friday and Saturday was 24circ. If the temperature on Saturday was 27circ, what was the temperature on Wednesday?

Ans-

Total temperature on Wednesday, Thursday and Friday was 25×3=75∘
Total temperature on Thursday, Friday and Saturday was 24×3=72∘
Hence, difference between the temperature on Wednesday and Saturday= 3∘
If Saturday temperature =27∘, then Wednesday’s temperature =27∘+3∘=30∘