Question #21775

A rectangular room is 10 m wide and 6m high. If the area of the 4 walls is 540m2, its length will be
a) 40m c) 45m b) 70m d) 35m

Expert's answer

S = high*2*wide + high*2*length

S - area of the 4 walls

high - high of the room

wide - wide of the room

length - length of the room

length = S/(2*high) -wide = 540/12 - 10 = 45 -10 =35

Answer: d) 35 m

S - area of the 4 walls

high - high of the room

wide - wide of the room

length - length of the room

length = S/(2*high) -wide = 540/12 - 10 = 45 -10 =35

Answer: d) 35 m

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