1.

1). 42 °C2). 46 °C3). 49 °C4). 48 °C

Answer»

We know,

Average of quantities = (Sum of all quantities)/(No. of quantities)

The average temperature on SUNDAY, Monday and Tuesday was 45 °C.

∴ Total temperature of Sunday, Monday and Tuesday = 45° × 3 = 135 °C

The average temperature on Monday, Tuesday and Wednesday it was 42 °C.

∴ Total temperature of Monday and Tuesday and Wednesday = 42° × 3 = 126 °C

As on Wednesday, it was exactly 40 °C.

∴ Total temperature of Monday and Tuesday = (126° – 40°)C = 86 °C

∴ The temperature of Sunday = (Total temperature of Sunday, Monday and Tuesday) - (Total temperature of Monday and Tuesday) = (135° - 86°)C = 49 °C



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