the base of triangle is 15 cm and height is 12 cm . the height of another triangle of double the area having base 20 cm is ?
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area of 1st triangle = 1/2×15×12=90cm^2
area of 2nd triangle= 180cm^2
area of 2nd triangle=1/2×20×height
180=10×h
h=18cm
area of 2nd triangle= 180cm^2
area of 2nd triangle=1/2×20×height
180=10×h
h=18cm
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