24. दिइएको प्रिज्मको पुरा सतहको
क्षेत्रफल पत्ता लगाउनुहोस् ।
Find the total surface area of
the given prism. Ans: 1848 cm?
Answers
formula of total surface area(T.S.A) of a prism = PH + 2B
(i) bc^2 = ba^2 + ac^2
bc^2 = 24^2 + 7^2
bc^2 = 576 + 49
bc^2 = 625
BC = √625
BC = 25
(ii). perimeter of triangle= AB + BC + CA = 24 + 7 + 25
= 56
area of triangle = 1/2 b h
= 1/2 (24 X 7)
= 12 X 7
= 84
(iii). lateral surface area = PH
= 56 X 30
= 1680
(iv). total surface area = 2 X area of triangle + PH
= (2 X 84) + 1680
= 169 + 1680
= 1848
therefore ,total surface area of this prism is 1848 sq.cm