5. A room is 10.2 m long, 8.5 m wide and 4.6rmhigh. It has a door meas

1.	5. A room is 10.2 m long, 8.5 m wide and 4.6rmhigh. It has a door measuring 1.5 m x 2.6 mand a window measuring 2 mx 1.7 m. Findthe cost of tiling the walls at the rate of13.50 per sq. m.
Answer» Area of the 4 walls = 2(l+b)×h sq. units= 2(10.2+8.5)×4.6 m sq.= 2×18.7×4.6 m sq.= 172.04 m sq. Area of a door = l×b sq. units= 1.5×2.6 m sq.= 3.9 m sq. Area of a window = 3.4 m sq. [ l×b ] Total tilling area = Area of 4 walls- (area of adoor + area of a window) = 172.04 - (3.9 + 3.4) m sq. = 164.74 m sq. Total cost = Rs. (13.50×164.74)= Rs. 2223.99= Rs. 2224

5. A room is 10.2 m long, 8.5 m wide and 4.6rmhigh. It has a door measuring 1.5 m x 2.6 mand a window measuring 2 mx 1.7 m. Findthe cost of tiling the walls at the rate of13.50 per sq. m.

Answer»

Area of the 4 walls = 2(l+b)×h sq. units= 2(10.2+8.5)×4.6 m sq.= 2×18.7×4.6 m sq.= 172.04 m sq.

Area of a door = l×b sq. units= 1.5×2.6 m sq.= 3.9 m sq.

Area of a window = 3.4 m sq. [ l×b ]

Total tilling area = Area of 4 walls- (area of adoor + area of a window) = 172.04 - (3.9 + 3.4) m sq. = 164.74 m sq.

Total cost = Rs. (13.50×164.74)= Rs. 2223.99= Rs. 2224