Question

In a Trapezium ABCD AD=DC=BC=20cm angle A =60°
find
1. length of AB
2. DISTANCE BETWEEN AB and DC
​

Answer 1

Answer:

Given, trapezium ABCD, AD=20, ∠A=60∘

Draw perpendicular from D on AB, which meets AB at E

Now, In △ADE,

sin60∘=ADDE

23=ADDE

DE=103

DE=17.32cm

Answer 2

Answer:

A Rectangular strip of 50 cm and 25 cm is rotated completely about the 25 cm find the total surface area of the solid the generated.

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