"The cross-section of a canal is trapezium in shape. The canal is 12 m wide at the to
Channel: Doubtnut
Date: 2020-04-05

"The
 cross-section of a canal is trapezium in shape. The canal is 12 m wide at the
 top and 8 m wide at the bottom. If the area of the cross-section is 840 sq.
 m, the depth of the canal is
(a) 8.75
 m (b) 42 m (c) 63 m (d) 84 m"