Question

C С
The cross-section of a tunnel perpendicular to its
length is a trapezium ABCD as shown in the adjacent
diagram. AM = BN, AB = 4.4 m; CD = 3 m. The
height of the tunnel is 2.4 m. The tunnel is 50 m long
Calculate (i) the cost of painting the internal surface of
the tunnel (excluding the floor) at the rate of 5/- A
per m². (ii) the cost of paving the floor at the rate of
* 18 per m²
[ICSE 1979]
M
NB​

Answer 1

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