A bomb is projected upwards. At topmost point it explodes in thre… - Vidyadip

MCQ

A bomb is projected upwards. At topmost point it explodes in three identical fragments. First fragment comes to ground in $10\ sec$. and others in $20\ sec$ each. Then the height reached by the original bomb is.........$m$

A
$800$
B
$1600$
✓
$1250$
D
$1500$

✓

Answer

Correct option: C.

$1250$

c
$h=v(10)+\frac{1}{2} g(10)^{2}$

$\mathrm{h}=-\frac{\mathrm{V}}{2}(20)+\frac{1}{2} \mathrm{g}(20)^{2}$

adding we get $\mathrm{h}=1250 \mathrm{m}$

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