A tree is 70 meters high. Its shadow is x metres shorter when the sun's altitude is 45° than when it is 30°. The value of x in metres is
1
70√3
2
70(√3 – 1)
3
70(√3 + 1)
4
70
A tree is 70 meters high. Its shadow is x metres shorter when the sun's altitude is 45° than when it is 30°. The value of x in metres is