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(x)
LCM of 25, 40, 60 = 600
add 8 in 600 = 608
608 is the the least number which when divided by 25, 40and 60 leaves the remainder 8 in each case.
(xi)
length of the rectangle = 70cm
breadth of the rectangle = 30cm
perimeter = 2 (l+b)
= 2(70 + 30)
= 2× 100 =
perimeter = 200cm
(xii)
sum of complementary angles = 90°
complement angle of 81° is
90° - 81°
9°
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