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Rajat Sharma

· started a discussion

· 1 Months ago

wrong answer ???? (Question: 108114.0 )

bhai answer 1080 hona chahiye , 1/2 se kyu multiply kiya h ,
knowledge expert ???

Question:

Base of a right pyramid is a square of area 324 sqm. If the volume of the pyramid is 1296 cu.m., then the area (in m2) of the slant surface is:

Options:
A) 360
B) 432
C) 540
D) 1080
Solution:
Ans: (c)

Height of pyramid = \(\cfrac{1296}{324}\times3=12\) mtr.

Slant height = \(\sqrt{12^2+9^2}=15\)     [\(\because\)Side of square = 18 m]

Area of slant surface  = \(4\times\cfrac{1}{2}18\times1515=540\) m2

Knowledge Expert

· commented

· 1 Months ago

Given answer is correct: area of triangle is: 1/2 x b x h

Ajit Kumar

· commented

· 1 Months ago

1/2 *base perimeter*slant height ye formula hota hai

SAURABH KUMAR

· commented

· 1 Months ago

Yet to be approved!

kundan kumar

· commented

· 1 Months ago

Yet to be approved!

ANKIT

· commented

· 1 Months ago

correct answer......... multiplied by 1/2 because we are calculating the area of triangular faces.

murari krishan

· commented

· 1 Months ago

wright ans

Shashank Shah

· commented

· 1 Months ago

Given answer is correct: area of triangle is: 1/2 x b x h
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