Question
The length, breadth and height of a room are in the
ratio 7:5:2. If the breadth and height are halved while the length is doubled, then the total area of the four walls of the room willSolution
Let length = 7, breadth = 5 & Height of room = 2 So original total area of four walls = 2(7 `xx` 2 + 5 `xx` 2) = 2(14 + 10) = 2 `xx` 24 = 48 Then new length = 14, new breadth = 2.5 and new height = 1 So new total area of four walls = 2(14 `xx` 1 + 2.5 `xx` 1) = 2(14 + 2.5) = 2 `xx` 16.5 = 33 ; Hence decrease in total area of four walls = (48 - 33)/48 `xx` 100 = 31.25%
647.1 ÷ ? + 72.3 × 209.81 – 8743.1 = 6404
? (30.03 - 17.98 × 15.99 ÷ 12.01) = 729.03
(699.88% of 32) + (80.44% of 400.23) = ? + (11.67)2
12, 16, ?, 36, 52, 72Â
(? + 11.86) X 14.89 = 19.89% of 2399.89
- √81.45 + √225.60 + 49.89% of (520.43 + 22.13% of 131.45) = ?
22.03 × 6.97 + 19.01 – 16.02 = ?
P spends 20% of his monthly income in travelling. He spends 25% of his monthly income on household expenses and spends 15% of his monthly income on fami...
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