CLEAR
Toprankers-Info

+91 7676564400

Mobile App

Get it on Google Play
Discussions
Select Date
Tags:

Articles

Discussions
Submit Discussion
ashray shrivastava

· started a discussion

· 1 Months ago

how does 30 comes? and formulaes? (Question: 388253.0 )

not clear

Question:

The base of a right prism is a right angled triangle whose sides are 5 cm, 12 cm and 13 cm. If the total surface area of the prism is 360 cm2, then its height (in cm) is –

Options:
A)

10

B)

12

C)

9

D)

11

Solution:

Ans: (a)

  

Kunal Choudhary

· commented

· 1 Months ago

Tsa is 360.. base is right triangle.. area of that triangle will be (1/2)*5*12=30.. there will be 2 triangles one on top and on on bottom.. total is 60.. subtract it.. area left is 360-60=300.. now there will be three sides as base is a triangle.. nd there will be three rectangles on the sides.. with one side as 5,12,13.. and same height.. suppose height is H.. so area of rectangles are 5H+12H+13H=300.. so 30H=300.. H=10

mrinal shastry

· commented

· 1 Months ago

lsa= perimeter of base*h
-logo
We at aim to provide most comprehensive content & test for practice which is carefully divided into various chapters and topics to help you focus on your weak areas.Our Practice mock test gives you unmatched analytics to help you realize your strong areas,time management and improvement areas.Our Short & Crisp notes on each topic will help you to quickly revise the topic along with the tips & tricks of the exams.
More About
-Info
-Info

Mobile App

Get it on Google Play
About Us Campus Ambassador Careers Contact Us Refund Policy

All Rights Reserved Top Rankers

User Policy
Disclaimer
Terms & Conditions