Question

What is the cost painting the two adjacent walls of a hall at rs. 5 per m2 which has no windows or doors? I. The area of the hall is 24 sq. M. Ii. The breadth, length and height of the hall are in the ratio of 4 : 6 : 5 respectively. Iii. Area of one wall is 30 sq. M.

Answer 1

Answer:

Correct option is

A

I only

From Statement II

breadth =4x, length =6x and height =5x

Area of one wall =length×height=30x

2

=30 sq. m.

Therefore x=1

⟹ length =6, breadth =4 and height =5

Surface area of two walls =(length×height)+(breadth×height)

=30+20=50sq.m

Therefore, cost of painting two adjacent walls =5×50=250Rs.

Hence, only statement II and III are required

I hope ki aap ko samajh aaya Ho