Question

Find the area in square metres of the parallelogram whose base and altitudes are as under:
(i) Base = 15 dm, altitude = 6.4 dm
(ii) Base = 1 m 40 cm, altitude = 60 cm

Answer 1

We have,
(i) Base = 15 dm = (15 x 10) cm = 150 cm = 1.5 m [Since 100 cm = 1 m]
Altitude = 6.4 dm = (6.4 x 10) cm = 64 cm = 0.64 m
Thus,
Area of the parallelogram = Base x Altitude
= 1.5 m x 0.64 m
= 0.96 m²

(ii) Base = 1 m 40 cm = 1.4 m [Since 100 cm = 1 m]
Altitude = 60 cm = 0.6 m
Thus,
Area of the parallelogram = Base x Altitude
= 1.4 m x 0.6 m
= 0.84 m²