Question

A room 11m * 8m * 5m. Find the cost of cementing its four walls and floor at the rate of ₹4 per square metre including doors and windows etc.

Answer 1

Hey,

l = 11 m
b = 8 m
h = 5 m
top of the room = lb
                           = 11 × 8
                           = 88 m

TSA of the cuboid = 2(lb + bh + hl)
                                =2(11×8 +8×5 + 5×11)
                                =2(183)
                                = 366 m²

what we want the by question = 366 - 88
                                                    = 278 m 

floor at the rate of the rs.4 = 278 × 4
                                              =1112 rupees

HOPE IT HELPS:-))

Answer 2

Step-by-step explanation:

this is answer

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