please help me to do 18 sum
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they have given,radius =4.2
height =15 cm
1. curved surface = 2 pie rh so 2×22÷7 ×42÷10×15 = 27720÷70 =396
2. total surface area =2pie rh(r×h) 2×22÷7×42÷10 (42÷10+15) 1848÷70 (19.2) =26.4 ×19.2 = 506.88
height =15 cm
1. curved surface = 2 pie rh so 2×22÷7 ×42÷10×15 = 27720÷70 =396
2. total surface area =2pie rh(r×h) 2×22÷7×42÷10 (42÷10+15) 1848÷70 (19.2) =26.4 ×19.2 = 506.88
tanisha5738:
Thank you very much jaspreet
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