The average temperature of the town in the first four days of a month

1.	The average temperature of the town in the first four days of a month was 58 degrees. The average for second, third, fourth and fifth days was 60 degrees. If the temperatures if the first and fifth days were in the ratio 7 : 8, then what is the temperature on the fifth day ? (a) 64 degrees (b) 62 degrees (c) 56 degrees (d) 48 degrees
Answer» Answer is: (a) 64 degrees Sum of temperatures on 1st, 2nd, 3rd and 4th days = (58 × 4) = 232 degrees … (1) Sum of temperatures on 2nd, 3rd, 4th and 5th days = (60 × 4) = 240 degrees …(2) Subtracting eqn. (1) from eqn. (2), we get Temp. on 5th day – Temp. on 1st = 8 degrees Given, Temp. on 1st day : Temp. on 5th day = 7 :8 ∴ 8x – 7x = 8 ⇒ x = 8 ∴ Temperature on 5th day = 64 degrees

The average temperature of the town in the first four days of a month was 58 degrees. The average for second, third, fourth and fifth days was 60 degrees. If the temperatures if the first and fifth days were in the ratio 7 : 8, then what is the temperature on the fifth day ? (a) 64 degrees (b) 62 degrees (c) 56 degrees (d) 48 degrees

Answer»

Answer is: (a) 64 degrees

Sum of temperatures on 1st, 2nd, 3rd and 4th days

= (58 × 4) = 232 degrees … (1)

Sum of temperatures on 2nd, 3rd, 4th and 5th days

= (60 × 4) = 240 degrees …(2)

Subtracting eqn. (1) from eqn. (2), we get

Temp. on 5th day – Temp. on 1st = 8 degrees

Given, Temp. on 1st day : Temp. on 5th day = 7 :8

∴ 8x – 7x = 8 ⇒ x = 8

∴ Temperature on 5th day = 64 degrees

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