Question
The sum of the length, breadth, and height of a cuboid
is 30 cm. If the length of the diagonal is 17 cm, find the total surface area of the cuboid.Solution
l+ b+ h = 30 Diagonal =17 Diagonal = √ l2+b2+h2 (l+ b+ h)2 = l2+b2+h2+ 2(l b+ b h +h l) (30)2 = (17)2 +2(l b+ b h +h l) 900 = 289 +2(l b+ b h +h l) 2(l b+ b h +h l) = 900-289=611 2(l b+ b h +h l) =611 Total surface area of cuboid =611 cm2
1550 ÷ 62 + 54.6 x 36 = (? x 10) + (28.5 x 40)     Â
Evaluate: 320 − {18 + 4 × (21 − 9)}
236.23 - 653.23 + 696.23 = ?
Simplify the following expressions and choose the correct option.
40% of 360 + 25% of 248 - 30
Determine the value of 'p' in following expression:
720 ÷ 9 + 640 ÷ 16 - p = √121 X 5 + 6²- 7The value of 97 × 103 is _________.
36×?² + (25% of 208 +13) = 60% of 2400 + 17×18
? = 20% of 1200 + 256
55.55% of 30000 – 1111 = ? × 1111
30% of 60% of 1800 + 13 × 14 = (? ÷ 75) × 5
Relevant for Exams:
