Question

The cross section ABCD of a swimming pool is a trapezium its width its = 14 metre depth at the shallow end is 1.5 m and at the deep end is 8 M find the area of the cross section

Answer 1

find the area of the cross selection
1/2×(1.5+8)×14
$1 \times (15 + 8) \times 14 \div 2$