Question
A cuboidal water tank has dimensions (20 × 14 × 12) cm
and is open from the top. If painting the outer surface costs Rs. 5 per cm², find the total painting cost.Solution
ATQ, Area to be painted = lateral surface area + area of base = 2 × (length + breadth) × height + length × breadth = 2 × (20 + 14) × 12 + 20 × 14 = 2 × 34 × 12 + 280 = 816 + 280 = 1,096 cm² Required cost = 1,096 × 5 = Rs. 5,480
Direction: Which of the following will replace ‘?’ in the given question?
5, 18, ‘?’, 126, 296, 586, 1044
5 ? 205 823 7405 29623
8   24    12    ?   18     54
15 12 5 ? -21 -40
...Direction: Which of the following will replace ‘?’ in the given question?
342, ‘?’, 420, 462, 506, 552, 60
There are three series given below which are following with the same pattern.
Series I: 21, 44, 135, 544, 2725
Series II: 14, B, C, D, E
51     53     109     332     ?     6686
...A series is 2100, 3431, 2431, 3160, 2648, 2991
If another series 1728, __, __, __, __, p, follows the same pattern as the given number series, th...
8 9 22 75 316 ?
...21 11.5 13 ? 45.5 116.75
...
