Question
An open-top metal box measures 20 cm in length, 10 cm in
width, and 12 cm in height. If the cost to paint each cm² from the outside is Rs. 6.5, how much will the total painting cost be?Solution
ATQ,
Area to be painted = side surface area + bottom area = 2 × (length + width) × height + length × width = 2 × (20 + 10) × 12 + 20 × 10 = 2 × 30 × 12 + 200 = 720 + 200 = 920 cm² Required cost = 920 × 6.5 = Rs. 5,980
28         57           172           689          ?              20677
...14 26 50 98 194 ?
...5                             6                             14              �...
89Â Â Â Â Â 78Â Â Â Â Â 74Â Â Â Â Â 67Â Â Â Â Â 63Â Â Â Â ?
100Â Â Â Â 221Â Â Â Â 77Â Â Â Â 245Â Â Â Â 50Â Â Â 275
Identify the logic of the below given series and given answer.
Series I :: 1840, 1719, (P), 1694, 1890, 1665, 1921
Series II :: 175, 4...
(45)2 ÷ ∛729 + (35)2 ÷ 1.4 =?
17                          26                          37                   �...
25 30 300 315 6300 ?
...2, 12, 90, 240, ?, 1260
