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Perspiration cools the body because evaporation requires latent heat. The heat from the body is absorbed to convert sweat into vapor, thereby cooling the skin. Information Booster:
144 (1/2) × 14 – 28 = 7 × ?
12% of 450 + 16% of 1500 = ?
1220 ÷ 61 ÷ 5 + 450 of 20% - 70 = √ ?
?2 = (1035 ÷ 23) × (1080 ÷ 24)
(286 ÷ 11 + 14) × 5 = 40 + 25% of ?
22 – 15 + 20 × 18 ÷ 6 – 34 = ?
The speed of the stream is 10 km/h. Boat ‘A’ covers 110 km distance against the stream in 11 hours and boat ‘B’ covers 65 km distance against th...
(480 + 340 - ?) × (3/19) = 90
311 × 17 = ? + 2482