Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
996 views
in Surface Areas And Volumes by (65.2k points)

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs. 7.50 perm2.

1 Answer

0 votes
by (65.5k points)
selected by
 
Best answer

Length of room, l = 5 m 

breadth, b = 4m 

height, h = 3 m 

White washing the room and the ceiling except floor to be made. 

∴ Area, A = lb + 2bh + 21h 

= lb + 2h(b + l) = (5 × 4) + 2 × 3(4 + 5) 

= 20 + 6(9) 

= 20 + 54 = 74 m2

Cost of white washing for 1 sq.m. is Rs. 7.50 

∴ Cost of white washing 74 sq. m. is ?

= 74 × 7.50

= Rs. 555.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...