Question

A box having a lid is 1.25 metres long 90 cm broad and 70cm high. find the area of its faces .

Answer 1

Hello !

90 cm = 0,9 m

70 cm = 0,7 m

( ( 0,7 m * 0,9 m ) * 2 ) + [ ( ( 0,7 m + 0,9 m ) * 2 ) * 1,25 ]

=> ( 0,63 m² × 2 ) + ( 2,8 m * 1,25 m )

=> 1,26 m² + 3,5 m²

=> 4,76 m²