Question

A room is twice as long as it is broad and its height is 4.5 m.if the cost of papering its wall 8 rupes 15persquare metre is rupes 2430 find the cost of paving marble on its floor at rupes 150 per square kilometre

Answer 1

sorry but I didn't understand your question

Answer 2

Answer:

soln,

here,

Given L = x

          B= 2x

          H= 4.5

Now,

Cost of papering wall c = Rs 2430

Rate of papering wall R = Rs 15 sq meter

Area of walls =  C/R

or, 2h (l+b) = 2430/15

or,  2* 4.5 ( x + 2x ) = 162

or, 9 * 3x = 162

or,  27x = 162

therefore x = 6

Again,

L = 6 and B = 12

Now again  to find Area of floor: R = RS 150

L * B = 6 * 12 = 72 meter

Now cost of paving marble is A * R

                                                  72 * Rs 150 = RS, 10,800