how to hide price range of the same product

Add the following code to your theme’s functions.php file and tweak it as necessary

add_filter('woocommerce_variable_price_html', 'ashah_variation_price', 10, 2);

function ashah_variation_price( $price, $product ) {

     $price = '';
     $price = 'From : ';
     $price .= woocommerce_price($product->get_price());

     return $price;
}

@anandamd The above code is not working.

Try switching to a default theme like Twenty Sixteen and see if it works then.

Code above should change something. If you see no changes at all, you may have added to the wrong place.