SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

The length, breadth and height of the room are in the ratio 3:2:1. The breadth and height of the room are halved and length of the room is doubled. The area of the four walls of the room will

(a) Decrease by 13.64%                             (b) Decrease by 15%

(c) Decrease by 18.75%                             (d) Decrease by 30%


Question ID - 50058 :-

The length, breadth and height of the room are in the ratio 3:2:1. The breadth and height of the room are halved and length of the room is doubled. The area of the four walls of the room will

(a) Decrease by 13.64%                             (b) Decrease by 15%

(c) Decrease by 18.75%                             (d) Decrease by 30%

1 Answer
5876 Votes
3537

Answer Key : (d) -

Length = breadth = height =

 

Area of 4 walls =

 

New length = new breadth =  new height =.

 

New area of the 4 walls =

 

Decrease in area =

 

Decrease % =



Next Question :

An infinitely long current carrying wire and a small current carrying loop are in the place of the paper as shown.  The radius of the loop is a and distance of its centre from the wire is d(d a). if the loop applies a force F on the wire then:

a.

F

b.

F

c.

F

d.

F=0


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