Question

5. A door of length 4 m and breadth 3 m is fitted in a wall. The length of the wall is 16 m
and the breadth of the wall is 13 m 9 cm. Find the cost of whitewashing the wall at the
rate of 20 per square meter​

Answer 1

Step-by-step explanation:

16 multiply 13.9 the answer is 222.4 the square rate 20per meter =20 multiply 222.4 the answer is=4448 . The cost of white washing is = 4449

Answer 2

Step-by-step explanation:

Here,

Area of whitewashing the wall =

= Area of wall - Area of door

area of wall = length × breadth

= 16 × 13.9 sqm

= 62.4 sqm

area of door = length × breadth

= 12 sqm

so area of whitewashing the wall =

= 62.4 - 12 sqm

=50.4 sqm

rate of whitewashing the wall = 20 rs/sqm

so, = 20×50.4 rs

= 1008 rs

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