A retailer buys Tokla tea at Rs. 525 per kg and mixed with Soktim tea bought at Rs.750 per kg. In what proportion should he mix two kinds of tea so as to make a profit of 5%
on selling the mixture at Rs. 700 per kg.?

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 30° f. after one-half minute the thermometer reads 50° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.)