h= 3.35 30-minute journey c. A 40Wh battery is used in a 20W torch (2 hours h = 40= 20 h = 2 Bam, for a whole week 4. Calculate the following rios is 22 cents) a. A 12v battery has a capacity of 3Ah. How long can it power a 24W circuit? vh = 3 * 12 4= 36 wh = 36 24 uch will it cost to run for h = 1 .5. st = $3. 84 x 28 b. A 6v battery has a capacity of 2Wh. How long can it power a 0.5A circuit? ah = a day. How much ah = 0. 353 76=$318,87 h = 0. 353 h= 0.67 with energy 79