the length of a room is 5.5 m and width is 3.75 m. find the cost of paying the floor by slabs at the rate of rs. 400 per sq. metre.  Choose the correct choice.
A) rs . 15,000
B) rs . 8,250
C) rs . 15,600
D) rs . 16,500
E) none
<gadget id="calculator">5.5 * 3.75</gadget>
<output>20.625</output>

<gadget id="calculator">400 * 20.625</gadget>
<output>8_250</output>

<result>B</result>
the length of a room is 5.5 m and width is 3.75 m. find the cost of paying the floor by slabs at the rate of rs. 400 per sq. metre.
multiply(400, multiply(5.5, 3.75))
"solution area of the floor = ( 5.5 x 3.75 ) m ² = 20.635 m ² cost of paying = rs . ( 400 x 20.625 ) = rs . 8,250 . answer b"