Question
A square whose diagonal is 12√ 2cm is made base of the
pyramid. if height of the pyramid is 15cm, then what is the total surface area of the pyramid.(cm 2)Solution
Diagonal of square =a√ 2 = 12 √ 2cm a=12cm           For square base of pyramid – 
now total surface area of pyramid =Area of base +1/2 ×perimeter of base ×slant height = (12)2+(4×12)/2 x3√29 =144+72√29 =72(2+√29) cm2
20    60      180      540     ?     4860
...2342 2223 2090 1943 1782 ?
...13 14 22.5 ? 120 363
...25Â Â Â Â Â Â Â Â Â Â 34Â Â Â Â Â Â Â Â Â Â 61Â Â Â Â Â Â Â Â Â Â 106Â Â Â Â Â Â Â Â 169Â Â Â Â Â Â Â Â ?
...85    135    172    ?     215    225
12, 6, 6, 9, 18, ?
96Â Â Â 111Â Â Â 131Â Â Â ? Â Â Â Â Â 186Â Â Â Â 221
61, 48, ?, 35, 87, 22
1.2Â Â Â Â Â Â Â 4.2Â Â Â Â Â Â Â Â ? Â Â Â Â Â Â Â Â Â Â Â 18.2Â Â Â Â Â Â Â 33.2 Â Â Â Â Â Â 56.2
...To find the Next number in the given series.
342 510 726 996 1326 ?
...
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