Question

the internal measures of a cuboidal room are 14 m * 10 m *8 m. find the cost of whitewashing the four walls and the ceiling of the room if the cost of whitewashing is rupees 20 per metre square​

Answer 1

Ans. LENGTH; 14M

BREADTH; 10M

HEIGHT; 8M

NOW; AREA TO BE WHITEWASHED= {AREA OF 4 WALLS + AREA OF CEILING}

THIS IS 2(L+B) × H + L × B

NOW ADDING VALUES

2 ( 14+10 ) ×8 + 14 ×10

384+140= 524M^2

NOW COST OF WHITEWASH IS 20/M^2

THIS IS 524 × 20

THIS GIVES ₹10480 ANS.